./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/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_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/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_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/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 892d3c9e0b7c167d810581087b0633fb7bb5cd8a7fe1ab934154adc1945085ff --- 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 20:22:56,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:22:56,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:22:56,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:22:56,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:22:56,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:22:56,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:22:56,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:22:56,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:22:56,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:22:56,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:22:56,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:22:56,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:22:56,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:22:56,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:22:56,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:22:56,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:22:56,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:22:56,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:22:56,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:22:56,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:22:56,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:22:56,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:22:56,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:22:56,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:22:56,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:22:56,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:22:56,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:22:56,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:22:56,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:22:56,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:22:56,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:22:56,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:22:56,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:22:56,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:22:56,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:22:56,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:22:56,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:22:56,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:22:56,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:22:56,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:22:56,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:22:56,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:22:56,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:22:56,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:22:56,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:22:56,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:22:56,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:22:56,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:22:56,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:22:56,858 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:22:56,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:22:56,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:22:56,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:22:56,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:22:56,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:22:56,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:22:56,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:22:56,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:22:56,862 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:22:56,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:22:56,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:22:56,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:22:56,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:22:56,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:22:56,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:22:56,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:22:56,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:22:56,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:22:56,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:22:56,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:22:56,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:22:56,865 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:22:56,865 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:22:56,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:22:56,866 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_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 892d3c9e0b7c167d810581087b0633fb7bb5cd8a7fe1ab934154adc1945085ff [2022-11-02 20:22:57,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:22:57,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:22:57,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:22:57,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:22:57,199 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:22:57,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2022-11-02 20:22:57,269 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/data/00abd7828/95413c9892c4451fa39b17c62eb2b265/FLAG7ba97c8d0 [2022-11-02 20:22:57,969 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:22:57,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2022-11-02 20:22:57,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/data/00abd7828/95413c9892c4451fa39b17c62eb2b265/FLAG7ba97c8d0 [2022-11-02 20:22:58,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/data/00abd7828/95413c9892c4451fa39b17c62eb2b265 [2022-11-02 20:22:58,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:22:58,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:22:58,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:22:58,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:22:58,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:22:58,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:22:58" (1/1) ... [2022-11-02 20:22:58,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f265db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:58, skipping insertion in model container [2022-11-02 20:22:58,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:22:58" (1/1) ... [2022-11-02 20:22:58,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:22:58,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:22:59,017 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_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/sv-benchmarks/c/eca-rers2012/Problem03_label55.c[56086,56099] [2022-11-02 20:22:59,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:22:59,059 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:22:59,449 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_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/sv-benchmarks/c/eca-rers2012/Problem03_label55.c[56086,56099] [2022-11-02 20:22:59,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:22:59,499 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:22:59,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59 WrapperNode [2022-11-02 20:22:59,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:22:59,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:22:59,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:22:59,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:22:59,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,656 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-02 20:22:59,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:22:59,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:22:59,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:22:59,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:22:59,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:22:59,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:22:59,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:22:59,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:22:59,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (1/1) ... [2022-11-02 20:22:59,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:22:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:59,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:22:59,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:22:59,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:22:59,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:22:59,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:22:59,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:22:59,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:22:59,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:23:02,179 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:23:02,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:23:02,201 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:23:02,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:02 BoogieIcfgContainer [2022-11-02 20:23:02,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:23:02,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:23:02,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:23:02,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:23:02,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:22:58" (1/3) ... [2022-11-02 20:23:02,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a40c8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:23:02, skipping insertion in model container [2022-11-02 20:23:02,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:22:59" (2/3) ... [2022-11-02 20:23:02,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a40c8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:23:02, skipping insertion in model container [2022-11-02 20:23:02,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:02" (3/3) ... [2022-11-02 20:23:02,217 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55.c [2022-11-02 20:23:02,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:23:02,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:23:02,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:23:02,396 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;@62475f4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:23:02,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:23:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-02 20:23:02,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:02,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:02,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -317002646, now seen corresponding path program 1 times [2022-11-02 20:23:02,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:02,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745423120] [2022-11-02 20:23:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:02,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:03,690 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 20:23:03,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745423120] [2022-11-02 20:23:03,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745423120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:03,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:03,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049005554] [2022-11-02 20:23:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:03,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:03,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:03,745 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:05,101 INFO L93 Difference]: Finished difference Result 843 states and 1493 transitions. [2022-11-02 20:23:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-11-02 20:23:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:05,120 INFO L225 Difference]: With dead ends: 843 [2022-11-02 20:23:05,124 INFO L226 Difference]: Without dead ends: 463 [2022-11-02 20:23:05,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:05,136 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:05,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 121 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:23:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-02 20:23:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-11-02 20:23:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6339285714285714) internal successors, (732), 448 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 732 transitions. [2022-11-02 20:23:05,270 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 732 transitions. Word has length 162 [2022-11-02 20:23:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:05,275 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 732 transitions. [2022-11-02 20:23:05,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 732 transitions. [2022-11-02 20:23:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-02 20:23:05,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:05,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:23:05,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:05,293 INFO L85 PathProgramCache]: Analyzing trace with hash 331981558, now seen corresponding path program 1 times [2022-11-02 20:23:05,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:05,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11584920] [2022-11-02 20:23:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:05,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:05,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11584920] [2022-11-02 20:23:05,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11584920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:05,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:05,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058682882] [2022-11-02 20:23:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:05,884 INFO L87 Difference]: Start difference. First operand 449 states and 732 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:07,110 INFO L93 Difference]: Finished difference Result 1333 states and 2180 transitions. [2022-11-02 20:23:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-11-02 20:23:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:07,119 INFO L225 Difference]: With dead ends: 1333 [2022-11-02 20:23:07,120 INFO L226 Difference]: Without dead ends: 886 [2022-11-02 20:23:07,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:07,123 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:07,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 114 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:23:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-11-02 20:23:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 882. [2022-11-02 20:23:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 1.6163450624290578) internal successors, (1424), 881 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1424 transitions. [2022-11-02 20:23:07,156 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1424 transitions. Word has length 168 [2022-11-02 20:23:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:07,157 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1424 transitions. [2022-11-02 20:23:07,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1424 transitions. [2022-11-02 20:23:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-02 20:23:07,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:07,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:07,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:23:07,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1835334450, now seen corresponding path program 1 times [2022-11-02 20:23:07,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:07,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160952108] [2022-11-02 20:23:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:07,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160952108] [2022-11-02 20:23:07,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160952108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:07,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:07,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:07,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795129206] [2022-11-02 20:23:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:07,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:07,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:07,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:07,458 INFO L87 Difference]: Start difference. First operand 882 states and 1424 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:08,611 INFO L93 Difference]: Finished difference Result 2575 states and 4172 transitions. [2022-11-02 20:23:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:08,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-11-02 20:23:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:08,618 INFO L225 Difference]: With dead ends: 2575 [2022-11-02 20:23:08,619 INFO L226 Difference]: Without dead ends: 1695 [2022-11-02 20:23:08,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:08,622 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:08,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:23:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-02 20:23:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1695. [2022-11-02 20:23:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 1.3984651711924438) internal successors, (2369), 1694 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2369 transitions. [2022-11-02 20:23:08,690 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2369 transitions. Word has length 168 [2022-11-02 20:23:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:08,691 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2369 transitions. [2022-11-02 20:23:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2369 transitions. [2022-11-02 20:23:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-02 20:23:08,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:08,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:23:08,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1871241535, now seen corresponding path program 1 times [2022-11-02 20:23:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110110939] [2022-11-02 20:23:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:09,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110110939] [2022-11-02 20:23:09,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110110939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:09,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:09,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420703471] [2022-11-02 20:23:09,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:09,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:09,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:09,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:09,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:09,120 INFO L87 Difference]: Start difference. First operand 1695 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:10,426 INFO L93 Difference]: Finished difference Result 5062 states and 7081 transitions. [2022-11-02 20:23:10,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:10,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-11-02 20:23:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:10,440 INFO L225 Difference]: With dead ends: 5062 [2022-11-02 20:23:10,440 INFO L226 Difference]: Without dead ends: 3369 [2022-11-02 20:23:10,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:10,444 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:10,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 216 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:23:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-11-02 20:23:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3360. [2022-11-02 20:23:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.3846382852039298) internal successors, (4651), 3359 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4651 transitions. [2022-11-02 20:23:10,526 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4651 transitions. Word has length 174 [2022-11-02 20:23:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:10,526 INFO L495 AbstractCegarLoop]: Abstraction has 3360 states and 4651 transitions. [2022-11-02 20:23:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4651 transitions. [2022-11-02 20:23:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-02 20:23:10,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:10,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:23:10,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash 962684326, now seen corresponding path program 1 times [2022-11-02 20:23:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652851724] [2022-11-02 20:23:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:10,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:10,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652851724] [2022-11-02 20:23:10,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652851724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:10,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:10,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:10,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543031914] [2022-11-02 20:23:10,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:10,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:10,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:10,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:10,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:10,862 INFO L87 Difference]: Start difference. First operand 3360 states and 4651 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:12,065 INFO L93 Difference]: Finished difference Result 10006 states and 13851 transitions. [2022-11-02 20:23:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:12,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-11-02 20:23:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:12,093 INFO L225 Difference]: With dead ends: 10006 [2022-11-02 20:23:12,093 INFO L226 Difference]: Without dead ends: 6648 [2022-11-02 20:23:12,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:12,105 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:12,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 224 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:23:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6648 states. [2022-11-02 20:23:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6648 to 6641. [2022-11-02 20:23:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 1.3284638554216868) internal successors, (8821), 6640 states have internal predecessors, (8821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 8821 transitions. [2022-11-02 20:23:12,285 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 8821 transitions. Word has length 175 [2022-11-02 20:23:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:12,287 INFO L495 AbstractCegarLoop]: Abstraction has 6641 states and 8821 transitions. [2022-11-02 20:23:12,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 8821 transitions. [2022-11-02 20:23:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-02 20:23:12,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:12,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:23:12,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1968582037, now seen corresponding path program 1 times [2022-11-02 20:23:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:12,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174621966] [2022-11-02 20:23:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:23:12,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:12,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174621966] [2022-11-02 20:23:12,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174621966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:12,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:12,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:12,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697963097] [2022-11-02 20:23:12,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:12,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:12,559 INFO L87 Difference]: Start difference. First operand 6641 states and 8821 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:13,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:13,855 INFO L93 Difference]: Finished difference Result 18403 states and 24736 transitions. [2022-11-02 20:23:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-11-02 20:23:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:13,912 INFO L225 Difference]: With dead ends: 18403 [2022-11-02 20:23:13,913 INFO L226 Difference]: Without dead ends: 12170 [2022-11-02 20:23:13,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:13,930 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:13,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:23:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2022-11-02 20:23:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 12127. [2022-11-02 20:23:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12127 states, 12126 states have (on average 1.318489196767277) internal successors, (15988), 12126 states have internal predecessors, (15988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12127 states to 12127 states and 15988 transitions. [2022-11-02 20:23:14,302 INFO L78 Accepts]: Start accepts. Automaton has 12127 states and 15988 transitions. Word has length 176 [2022-11-02 20:23:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:14,303 INFO L495 AbstractCegarLoop]: Abstraction has 12127 states and 15988 transitions. [2022-11-02 20:23:14,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 12127 states and 15988 transitions. [2022-11-02 20:23:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-02 20:23:14,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:14,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:23:14,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2124767808, now seen corresponding path program 1 times [2022-11-02 20:23:14,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:14,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303986042] [2022-11-02 20:23:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:23:14,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303986042] [2022-11-02 20:23:14,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303986042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:14,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:14,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:23:14,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704798994] [2022-11-02 20:23:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:14,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:14,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:14,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:14,831 INFO L87 Difference]: Start difference. First operand 12127 states and 15988 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:16,200 INFO L93 Difference]: Finished difference Result 31583 states and 42424 transitions. [2022-11-02 20:23:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-11-02 20:23:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:16,248 INFO L225 Difference]: With dead ends: 31583 [2022-11-02 20:23:16,248 INFO L226 Difference]: Without dead ends: 19864 [2022-11-02 20:23:16,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:16,265 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:16,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 362 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:23:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2022-11-02 20:23:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 19854. [2022-11-02 20:23:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19854 states, 19853 states have (on average 1.279806578350879) internal successors, (25408), 19853 states have internal predecessors, (25408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19854 states to 19854 states and 25408 transitions. [2022-11-02 20:23:16,827 INFO L78 Accepts]: Start accepts. Automaton has 19854 states and 25408 transitions. Word has length 183 [2022-11-02 20:23:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:16,828 INFO L495 AbstractCegarLoop]: Abstraction has 19854 states and 25408 transitions. [2022-11-02 20:23:16,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 19854 states and 25408 transitions. [2022-11-02 20:23:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-02 20:23:16,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:16,853 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:16,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:23:16,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1144319502, now seen corresponding path program 1 times [2022-11-02 20:23:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506790747] [2022-11-02 20:23:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:23:17,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:17,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506790747] [2022-11-02 20:23:17,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506790747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:17,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:17,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:23:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157222646] [2022-11-02 20:23:17,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:17,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:17,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:17,309 INFO L87 Difference]: Start difference. First operand 19854 states and 25408 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:18,957 INFO L93 Difference]: Finished difference Result 45523 states and 58726 transitions. [2022-11-02 20:23:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:23:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-11-02 20:23:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:19,013 INFO L225 Difference]: With dead ends: 45523 [2022-11-02 20:23:19,013 INFO L226 Difference]: Without dead ends: 26077 [2022-11-02 20:23:19,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:19,033 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 563 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:19,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 53 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:23:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26077 states. [2022-11-02 20:23:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26077 to 26068. [2022-11-02 20:23:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26068 states, 26067 states have (on average 1.2348946944412476) internal successors, (32190), 26067 states have internal predecessors, (32190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26068 states to 26068 states and 32190 transitions. [2022-11-02 20:23:19,749 INFO L78 Accepts]: Start accepts. Automaton has 26068 states and 32190 transitions. Word has length 187 [2022-11-02 20:23:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:19,749 INFO L495 AbstractCegarLoop]: Abstraction has 26068 states and 32190 transitions. [2022-11-02 20:23:19,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 26068 states and 32190 transitions. [2022-11-02 20:23:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-02 20:23:19,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:19,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:19,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:23:19,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash -496785840, now seen corresponding path program 1 times [2022-11-02 20:23:19,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:19,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501323161] [2022-11-02 20:23:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:19,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:20,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:20,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501323161] [2022-11-02 20:23:20,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501323161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:20,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:20,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:20,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783466010] [2022-11-02 20:23:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:20,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:20,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:20,430 INFO L87 Difference]: Start difference. First operand 26068 states and 32190 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:21,748 INFO L93 Difference]: Finished difference Result 67615 states and 83814 transitions. [2022-11-02 20:23:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2022-11-02 20:23:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:21,849 INFO L225 Difference]: With dead ends: 67615 [2022-11-02 20:23:21,849 INFO L226 Difference]: Without dead ends: 41955 [2022-11-02 20:23:21,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:21,878 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 207 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:21,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 108 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:23:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41955 states. [2022-11-02 20:23:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41955 to 41940. [2022-11-02 20:23:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41940 states, 41939 states have (on average 1.2147643005317246) internal successors, (50946), 41939 states have internal predecessors, (50946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41940 states to 41940 states and 50946 transitions. [2022-11-02 20:23:22,911 INFO L78 Accepts]: Start accepts. Automaton has 41940 states and 50946 transitions. Word has length 190 [2022-11-02 20:23:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:22,917 INFO L495 AbstractCegarLoop]: Abstraction has 41940 states and 50946 transitions. [2022-11-02 20:23:22,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 41940 states and 50946 transitions. [2022-11-02 20:23:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-02 20:23:22,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:22,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:22,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:23:22,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash -99342165, now seen corresponding path program 1 times [2022-11-02 20:23:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064359257] [2022-11-02 20:23:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:23,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064359257] [2022-11-02 20:23:23,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064359257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:23,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:23,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:23,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637297740] [2022-11-02 20:23:23,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:23,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:23,608 INFO L87 Difference]: Start difference. First operand 41940 states and 50946 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:25,377 INFO L93 Difference]: Finished difference Result 98164 states and 120488 transitions. [2022-11-02 20:23:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:25,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-11-02 20:23:25,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:25,472 INFO L225 Difference]: With dead ends: 98164 [2022-11-02 20:23:25,473 INFO L226 Difference]: Without dead ends: 57241 [2022-11-02 20:23:25,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:25,500 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:25,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 180 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:23:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57241 states. [2022-11-02 20:23:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57241 to 57213. [2022-11-02 20:23:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57213 states, 57212 states have (on average 1.2304411661889114) internal successors, (70396), 57212 states have internal predecessors, (70396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57213 states to 57213 states and 70396 transitions. [2022-11-02 20:23:26,800 INFO L78 Accepts]: Start accepts. Automaton has 57213 states and 70396 transitions. Word has length 192 [2022-11-02 20:23:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:26,800 INFO L495 AbstractCegarLoop]: Abstraction has 57213 states and 70396 transitions. [2022-11-02 20:23:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 57213 states and 70396 transitions. [2022-11-02 20:23:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-02 20:23:26,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:26,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:26,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:23:26,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 305930593, now seen corresponding path program 1 times [2022-11-02 20:23:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:26,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387599349] [2022-11-02 20:23:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:27,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387599349] [2022-11-02 20:23:27,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387599349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:27,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:27,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275449049] [2022-11-02 20:23:27,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:27,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:27,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:27,741 INFO L87 Difference]: Start difference. First operand 57213 states and 70396 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:29,490 INFO L93 Difference]: Finished difference Result 137641 states and 169699 transitions. [2022-11-02 20:23:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-11-02 20:23:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:29,603 INFO L225 Difference]: With dead ends: 137641 [2022-11-02 20:23:29,603 INFO L226 Difference]: Without dead ends: 81445 [2022-11-02 20:23:29,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:29,626 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:29,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 164 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:23:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81445 states. [2022-11-02 20:23:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81445 to 81441. [2022-11-02 20:23:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81441 states, 81440 states have (on average 1.231630648330059) internal successors, (100304), 81440 states have internal predecessors, (100304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81441 states to 81441 states and 100304 transitions. [2022-11-02 20:23:31,425 INFO L78 Accepts]: Start accepts. Automaton has 81441 states and 100304 transitions. Word has length 196 [2022-11-02 20:23:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:31,426 INFO L495 AbstractCegarLoop]: Abstraction has 81441 states and 100304 transitions. [2022-11-02 20:23:31,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 81441 states and 100304 transitions. [2022-11-02 20:23:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-02 20:23:31,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:31,459 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:31,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:23:31,460 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2091308555, now seen corresponding path program 1 times [2022-11-02 20:23:31,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:31,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119888655] [2022-11-02 20:23:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:31,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:23:32,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:32,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119888655] [2022-11-02 20:23:32,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119888655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:32,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:32,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:23:32,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32043740] [2022-11-02 20:23:32,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:32,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:32,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:32,048 INFO L87 Difference]: Start difference. First operand 81441 states and 100304 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:34,371 INFO L93 Difference]: Finished difference Result 206240 states and 254661 transitions. [2022-11-02 20:23:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:23:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-11-02 20:23:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:34,575 INFO L225 Difference]: With dead ends: 206240 [2022-11-02 20:23:34,576 INFO L226 Difference]: Without dead ends: 125816 [2022-11-02 20:23:34,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:34,647 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 546 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:34,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 476 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:23:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125816 states. [2022-11-02 20:23:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125816 to 125596. [2022-11-02 20:23:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125596 states, 125595 states have (on average 1.217588279788208) internal successors, (152923), 125595 states have internal predecessors, (152923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125596 states to 125596 states and 152923 transitions. [2022-11-02 20:23:37,155 INFO L78 Accepts]: Start accepts. Automaton has 125596 states and 152923 transitions. Word has length 207 [2022-11-02 20:23:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:37,156 INFO L495 AbstractCegarLoop]: Abstraction has 125596 states and 152923 transitions. [2022-11-02 20:23:37,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 125596 states and 152923 transitions. [2022-11-02 20:23:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-02 20:23:37,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:37,200 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:23:37,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -254767863, now seen corresponding path program 1 times [2022-11-02 20:23:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:37,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5303312] [2022-11-02 20:23:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:23:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:37,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5303312] [2022-11-02 20:23:37,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5303312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:37,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:37,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:23:37,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489162419] [2022-11-02 20:23:37,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:37,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:37,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:37,485 INFO L87 Difference]: Start difference. First operand 125596 states and 152923 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:39,706 INFO L93 Difference]: Finished difference Result 217962 states and 268207 transitions. [2022-11-02 20:23:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-11-02 20:23:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:39,828 INFO L225 Difference]: With dead ends: 217962 [2022-11-02 20:23:39,828 INFO L226 Difference]: Without dead ends: 94810 [2022-11-02 20:23:39,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:39,896 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 171 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:39,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 370 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:23:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94810 states. [2022-11-02 20:23:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94810 to 88914. [2022-11-02 20:23:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88914 states, 88913 states have (on average 1.1646440902905086) internal successors, (103552), 88913 states have internal predecessors, (103552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88914 states to 88914 states and 103552 transitions. [2022-11-02 20:23:41,558 INFO L78 Accepts]: Start accepts. Automaton has 88914 states and 103552 transitions. Word has length 228 [2022-11-02 20:23:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:41,559 INFO L495 AbstractCegarLoop]: Abstraction has 88914 states and 103552 transitions. [2022-11-02 20:23:41,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88914 states and 103552 transitions. [2022-11-02 20:23:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-02 20:23:41,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:41,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:41,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:23:41,585 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash -621277898, now seen corresponding path program 1 times [2022-11-02 20:23:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96427722] [2022-11-02 20:23:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:42,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:42,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96427722] [2022-11-02 20:23:42,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96427722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:42,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:42,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:42,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883515734] [2022-11-02 20:23:42,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:42,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:42,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:42,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:42,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:42,572 INFO L87 Difference]: Start difference. First operand 88914 states and 103552 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:43,733 INFO L93 Difference]: Finished difference Result 168059 states and 195531 transitions. [2022-11-02 20:23:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:43,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-11-02 20:23:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:43,817 INFO L225 Difference]: With dead ends: 168059 [2022-11-02 20:23:43,817 INFO L226 Difference]: Without dead ends: 88711 [2022-11-02 20:23:44,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:44,185 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:44,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 150 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:23:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88711 states. [2022-11-02 20:23:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88711 to 88711. [2022-11-02 20:23:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88711 states, 88710 states have (on average 1.1647503099988727) internal successors, (103325), 88710 states have internal predecessors, (103325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88711 states to 88711 states and 103325 transitions. [2022-11-02 20:23:45,606 INFO L78 Accepts]: Start accepts. Automaton has 88711 states and 103325 transitions. Word has length 236 [2022-11-02 20:23:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:45,606 INFO L495 AbstractCegarLoop]: Abstraction has 88711 states and 103325 transitions. [2022-11-02 20:23:45,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 88711 states and 103325 transitions. [2022-11-02 20:23:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-02 20:23:45,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:45,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:45,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:23:45,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -805026293, now seen corresponding path program 1 times [2022-11-02 20:23:45,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15686062] [2022-11-02 20:23:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:45,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:46,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:46,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15686062] [2022-11-02 20:23:46,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15686062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:46,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:46,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:23:46,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551736258] [2022-11-02 20:23:46,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:46,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:46,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:46,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:46,035 INFO L87 Difference]: Start difference. First operand 88711 states and 103325 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:48,139 INFO L93 Difference]: Finished difference Result 170141 states and 198635 transitions. [2022-11-02 20:23:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:23:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2022-11-02 20:23:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:48,234 INFO L225 Difference]: With dead ends: 170141 [2022-11-02 20:23:48,234 INFO L226 Difference]: Without dead ends: 96485 [2022-11-02 20:23:48,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:48,269 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 360 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:48,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 114 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:23:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96485 states. [2022-11-02 20:23:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96485 to 93399. [2022-11-02 20:23:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93399 states, 93398 states have (on average 1.1642005182123814) internal successors, (108734), 93398 states have internal predecessors, (108734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93399 states to 93399 states and 108734 transitions. [2022-11-02 20:23:49,604 INFO L78 Accepts]: Start accepts. Automaton has 93399 states and 108734 transitions. Word has length 264 [2022-11-02 20:23:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:49,605 INFO L495 AbstractCegarLoop]: Abstraction has 93399 states and 108734 transitions. [2022-11-02 20:23:49,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 93399 states and 108734 transitions. [2022-11-02 20:23:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-02 20:23:50,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:50,082 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:50,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:23:50,098 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1682192666, now seen corresponding path program 1 times [2022-11-02 20:23:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:50,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357367328] [2022-11-02 20:23:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:23:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357367328] [2022-11-02 20:23:50,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357367328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:50,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:50,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:23:50,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82812584] [2022-11-02 20:23:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:50,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:50,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:50,616 INFO L87 Difference]: Start difference. First operand 93399 states and 108734 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:52,105 INFO L93 Difference]: Finished difference Result 185792 states and 216123 transitions. [2022-11-02 20:23:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2022-11-02 20:23:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:52,207 INFO L225 Difference]: With dead ends: 185792 [2022-11-02 20:23:52,208 INFO L226 Difference]: Without dead ends: 85702 [2022-11-02 20:23:52,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:52,677 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 163 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:52,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 375 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:23:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85702 states. [2022-11-02 20:23:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85702 to 67382. [2022-11-02 20:23:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67382 states, 67381 states have (on average 1.1146465620872352) internal successors, (75106), 67381 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67382 states to 67382 states and 75106 transitions. [2022-11-02 20:23:53,386 INFO L78 Accepts]: Start accepts. Automaton has 67382 states and 75106 transitions. Word has length 284 [2022-11-02 20:23:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:53,387 INFO L495 AbstractCegarLoop]: Abstraction has 67382 states and 75106 transitions. [2022-11-02 20:23:53,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67382 states and 75106 transitions. [2022-11-02 20:23:53,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-11-02 20:23:53,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:53,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:53,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:23:53,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1771235932, now seen corresponding path program 1 times [2022-11-02 20:23:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034571857] [2022-11-02 20:23:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:54,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034571857] [2022-11-02 20:23:54,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034571857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:54,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:54,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:23:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986722428] [2022-11-02 20:23:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:23:54,410 INFO L87 Difference]: Start difference. First operand 67382 states and 75106 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:55,375 INFO L93 Difference]: Finished difference Result 129072 states and 143708 transitions. [2022-11-02 20:23:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:23:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2022-11-02 20:23:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:55,436 INFO L225 Difference]: With dead ends: 129072 [2022-11-02 20:23:55,436 INFO L226 Difference]: Without dead ends: 69224 [2022-11-02 20:23:55,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:23:55,706 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 85 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:55,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 110 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:23:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69224 states. [2022-11-02 20:23:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69224 to 69006. [2022-11-02 20:23:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69006 states, 69005 states have (on average 1.1108180566625607) internal successors, (76652), 69005 states have internal predecessors, (76652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69006 states to 69006 states and 76652 transitions. [2022-11-02 20:23:56,362 INFO L78 Accepts]: Start accepts. Automaton has 69006 states and 76652 transitions. Word has length 292 [2022-11-02 20:23:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:56,363 INFO L495 AbstractCegarLoop]: Abstraction has 69006 states and 76652 transitions. [2022-11-02 20:23:56,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 69006 states and 76652 transitions. [2022-11-02 20:23:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-02 20:23:56,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:56,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:56,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:23:56,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2012492047, now seen corresponding path program 1 times [2022-11-02 20:23:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:56,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979774782] [2022-11-02 20:23:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:58,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979774782] [2022-11-02 20:23:58,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979774782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:58,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615706070] [2022-11-02 20:23:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:58,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:58,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:58,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:23:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:23:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-02 20:23:59,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:59,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615706070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:59,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:23:59,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-02 20:23:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155687588] [2022-11-02 20:23:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:23:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:23:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:23:59,463 INFO L87 Difference]: Start difference. First operand 69006 states and 76652 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:00,589 INFO L93 Difference]: Finished difference Result 156757 states and 175249 transitions. [2022-11-02 20:24:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:24:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-11-02 20:24:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:00,673 INFO L225 Difference]: With dead ends: 156757 [2022-11-02 20:24:00,673 INFO L226 Difference]: Without dead ends: 88770 [2022-11-02 20:24:00,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:24:00,704 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 93 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:00,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 88 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:24:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88770 states. [2022-11-02 20:24:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88770 to 86324. [2022-11-02 20:24:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86324 states, 86323 states have (on average 1.1125424278581606) internal successors, (96038), 86323 states have internal predecessors, (96038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86324 states to 86324 states and 96038 transitions. [2022-11-02 20:24:01,745 INFO L78 Accepts]: Start accepts. Automaton has 86324 states and 96038 transitions. Word has length 294 [2022-11-02 20:24:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:01,745 INFO L495 AbstractCegarLoop]: Abstraction has 86324 states and 96038 transitions. [2022-11-02 20:24:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 86324 states and 96038 transitions. [2022-11-02 20:24:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-02 20:24:01,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:01,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:01,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:24:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:24:01,959 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 250008961, now seen corresponding path program 1 times [2022-11-02 20:24:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933779366] [2022-11-02 20:24:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:24:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:02,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933779366] [2022-11-02 20:24:02,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933779366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:02,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:02,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:24:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134931378] [2022-11-02 20:24:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:24:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:24:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:24:02,767 INFO L87 Difference]: Start difference. First operand 86324 states and 96038 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:04,321 INFO L93 Difference]: Finished difference Result 166607 states and 185364 transitions. [2022-11-02 20:24:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:24:04,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2022-11-02 20:24:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:04,406 INFO L225 Difference]: With dead ends: 166607 [2022-11-02 20:24:04,406 INFO L226 Difference]: Without dead ends: 87003 [2022-11-02 20:24:04,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:24:04,441 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 366 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:04,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 99 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:24:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87003 states. [2022-11-02 20:24:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87003 to 85309. [2022-11-02 20:24:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85309 states, 85308 states have (on average 1.1124513527453463) internal successors, (94901), 85308 states have internal predecessors, (94901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85309 states to 85309 states and 94901 transitions. [2022-11-02 20:24:05,861 INFO L78 Accepts]: Start accepts. Automaton has 85309 states and 94901 transitions. Word has length 300 [2022-11-02 20:24:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:05,861 INFO L495 AbstractCegarLoop]: Abstraction has 85309 states and 94901 transitions. [2022-11-02 20:24:05,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 85309 states and 94901 transitions. [2022-11-02 20:24:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-11-02 20:24:05,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:05,880 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:05,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:24:05,880 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1883543636, now seen corresponding path program 1 times [2022-11-02 20:24:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:05,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971838729] [2022-11-02 20:24:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:05,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-02 20:24:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:06,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971838729] [2022-11-02 20:24:06,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971838729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:06,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565244904] [2022-11-02 20:24:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:06,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:06,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:06,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:06,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_269ff610-49bc-4c5e-93ea-1bebfe5f3b0a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:24:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:24:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:24:07,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:24:07,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565244904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:07,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:24:07,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-11-02 20:24:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301612613] [2022-11-02 20:24:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:07,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:24:07,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:24:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:24:07,284 INFO L87 Difference]: Start difference. First operand 85309 states and 94901 transitions. Second operand has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:09,233 INFO L93 Difference]: Finished difference Result 227768 states and 252500 transitions. [2022-11-02 20:24:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:24:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2022-11-02 20:24:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:09,362 INFO L225 Difference]: With dead ends: 227768 [2022-11-02 20:24:09,363 INFO L226 Difference]: Without dead ends: 143478 [2022-11-02 20:24:09,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:24:09,396 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 876 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:09,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 571 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:24:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143478 states. [2022-11-02 20:24:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143478 to 131456. [2022-11-02 20:24:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131456 states, 131455 states have (on average 1.1081738998136244) internal successors, (145675), 131455 states have internal predecessors, (145675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)