./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8 --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 355322de5dcfb8cbd44ad690b6b14768d5a2fa38ff5dfd1ede94c260e278eb8b --- 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-e04fb08 [2022-11-16 11:43:57,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:43:57,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:43:57,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:43:57,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:43:57,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:43:57,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:43:57,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:43:57,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:43:57,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:43:57,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:43:57,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:43:57,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:43:57,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:43:57,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:43:57,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:43:57,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:43:57,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:43:57,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:43:57,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:43:57,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:43:57,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:43:57,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:43:57,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:43:57,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:43:57,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:43:57,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:43:57,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:43:57,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:43:57,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:43:57,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:43:57,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:43:57,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:43:57,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:43:57,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:43:57,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:43:57,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:43:57,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:43:57,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:43:57,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:43:57,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:43:57,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:43:57,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:43:57,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:43:57,851 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:43:57,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:43:57,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:43:57,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:43:57,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:43:57,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:43:57,854 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:43:57,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:43:57,854 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:43:57,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:43:57,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:43:57,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:43:57,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:43:57,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:43:57,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:43:57,856 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:43:57,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:43:57,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:43:57,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:43:57,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:43:57,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:43:57,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:43:57,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:57,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:43:57,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:43:57,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:43:57,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:43:57,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:43:57,859 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:43:57,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:43:57,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:43:57,860 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_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355322de5dcfb8cbd44ad690b6b14768d5a2fa38ff5dfd1ede94c260e278eb8b [2022-11-16 11:43:58,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:43:58,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:43:58,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:43:58,148 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:43:58,149 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:43:58,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2022-11-16 11:43:58,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/data/f4de50f9c/6ae75ab7f1fa4c9180ddb113f4f14bb9/FLAGefa00e2f1 [2022-11-16 11:43:59,136 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:43:59,137 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2022-11-16 11:43:59,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/data/f4de50f9c/6ae75ab7f1fa4c9180ddb113f4f14bb9/FLAGefa00e2f1 [2022-11-16 11:43:59,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/data/f4de50f9c/6ae75ab7f1fa4c9180ddb113f4f14bb9 [2022-11-16 11:43:59,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:43:59,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:43:59,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:59,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:43:59,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:43:59,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:59" (1/1) ... [2022-11-16 11:43:59,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610646e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:59, skipping insertion in model container [2022-11-16 11:43:59,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:59" (1/1) ... [2022-11-16 11:43:59,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:43:59,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:44:00,199 WARN L229 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_0222991c-1676-4a22-9fa0-f62f213a38ad/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[8616,8629] [2022-11-16 11:44:00,243 WARN L229 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_0222991c-1676-4a22-9fa0-f62f213a38ad/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[10953,10966] [2022-11-16 11:44:01,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:44:01,405 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:44:01,482 WARN L229 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_0222991c-1676-4a22-9fa0-f62f213a38ad/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[8616,8629] [2022-11-16 11:44:01,486 WARN L229 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_0222991c-1676-4a22-9fa0-f62f213a38ad/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[10953,10966] [2022-11-16 11:44:02,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:44:02,092 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:44:02,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02 WrapperNode [2022-11-16 11:44:02,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:44:02,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:44:02,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:44:02,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:44:02,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,545 INFO L138 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5015 [2022-11-16 11:44:02,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:44:02,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:44:02,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:44:02,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:44:02,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,963 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:02,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:03,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:44:03,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:44:03,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:44:03,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:44:03,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (1/1) ... [2022-11-16 11:44:03,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:44:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:03,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:44:03,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:44:03,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:44:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:44:03,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:44:03,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:44:03,487 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:44:03,504 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:44:08,988 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:44:09,002 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:44:09,002 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:44:09,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:44:09 BoogieIcfgContainer [2022-11-16 11:44:09,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:44:09,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:44:09,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:44:09,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:44:09,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:43:59" (1/3) ... [2022-11-16 11:44:09,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1109bc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:44:09, skipping insertion in model container [2022-11-16 11:44:09,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:02" (2/3) ... [2022-11-16 11:44:09,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1109bc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:44:09, skipping insertion in model container [2022-11-16 11:44:09,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:44:09" (3/3) ... [2022-11-16 11:44:09,015 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2022-11-16 11:44:09,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:44:09,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 11:44:09,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:09,113 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;@456082eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:09,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 885 states, 882 states have (on average 1.9058956916099774) internal successors, (1681), 884 states have internal predecessors, (1681), 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) [2022-11-16 11:44:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:44:09,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:09,130 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] [2022-11-16 11:44:09,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1665955109, now seen corresponding path program 1 times [2022-11-16 11:44:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:09,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619915029] [2022-11-16 11:44:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:09,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619915029] [2022-11-16 11:44:09,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619915029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:09,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:09,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992892007] [2022-11-16 11:44:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:09,559 INFO L87 Difference]: Start difference. First operand has 885 states, 882 states have (on average 1.9058956916099774) internal successors, (1681), 884 states have internal predecessors, (1681), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:15,032 INFO L93 Difference]: Finished difference Result 2512 states and 4826 transitions. [2022-11-16 11:44:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:44:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:15,061 INFO L225 Difference]: With dead ends: 2512 [2022-11-16 11:44:15,062 INFO L226 Difference]: Without dead ends: 1570 [2022-11-16 11:44:15,069 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 [2022-11-16 11:44:15,073 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 913 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:15,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 639 Invalid, 3033 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-16 11:44:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-11-16 11:44:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-11-16 11:44:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1568 states have (on average 1.6116071428571428) internal successors, (2527), 1569 states have internal predecessors, (2527), 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) [2022-11-16 11:44:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2527 transitions. [2022-11-16 11:44:15,195 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2527 transitions. Word has length 20 [2022-11-16 11:44:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:15,195 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 2527 transitions. [2022-11-16 11:44:15,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2527 transitions. [2022-11-16 11:44:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:44:15,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:15,197 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] [2022-11-16 11:44:15,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:44:15,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash 120362348, now seen corresponding path program 1 times [2022-11-16 11:44:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:15,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620450125] [2022-11-16 11:44:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:15,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620450125] [2022-11-16 11:44:15,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620450125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:15,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:15,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:44:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926854264] [2022-11-16 11:44:15,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:15,460 INFO L87 Difference]: Start difference. First operand 1570 states and 2527 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:15,598 INFO L93 Difference]: Finished difference Result 1646 states and 2645 transitions. [2022-11-16 11:44:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:15,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:44:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:15,606 INFO L225 Difference]: With dead ends: 1646 [2022-11-16 11:44:15,607 INFO L226 Difference]: Without dead ends: 1606 [2022-11-16 11:44:15,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:15,612 INFO L413 NwaCegarLoop]: 1544 mSDtfsCounter, 59 mSDsluCounter, 4604 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6148 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:15,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6148 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-11-16 11:44:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1570. [2022-11-16 11:44:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1568 states have (on average 1.596938775510204) internal successors, (2504), 1569 states have internal predecessors, (2504), 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) [2022-11-16 11:44:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2504 transitions. [2022-11-16 11:44:15,679 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2504 transitions. Word has length 22 [2022-11-16 11:44:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:15,680 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 2504 transitions. [2022-11-16 11:44:15,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2504 transitions. [2022-11-16 11:44:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:44:15,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:15,692 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] [2022-11-16 11:44:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:44:15,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 550762215, now seen corresponding path program 1 times [2022-11-16 11:44:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:15,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358789574] [2022-11-16 11:44:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:15,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:15,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358789574] [2022-11-16 11:44:15,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358789574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:15,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:15,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812310400] [2022-11-16 11:44:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:15,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:15,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:15,875 INFO L87 Difference]: Start difference. First operand 1570 states and 2504 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:16,083 INFO L93 Difference]: Finished difference Result 1858 states and 2960 transitions. [2022-11-16 11:44:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:16,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 11:44:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:16,091 INFO L225 Difference]: With dead ends: 1858 [2022-11-16 11:44:16,092 INFO L226 Difference]: Without dead ends: 1822 [2022-11-16 11:44:16,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:44:16,094 INFO L413 NwaCegarLoop]: 1521 mSDtfsCounter, 6262 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6262 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:16,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6262 Valid, 2187 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-11-16 11:44:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1604. [2022-11-16 11:44:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1602 states have (on average 1.5967540574282146) internal successors, (2558), 1603 states have internal predecessors, (2558), 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) [2022-11-16 11:44:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2558 transitions. [2022-11-16 11:44:16,144 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2558 transitions. Word has length 44 [2022-11-16 11:44:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2558 transitions. [2022-11-16 11:44:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2558 transitions. [2022-11-16 11:44:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:44:16,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:16,147 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] [2022-11-16 11:44:16,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:44:16,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash -414187945, now seen corresponding path program 1 times [2022-11-16 11:44:16,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:16,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733309207] [2022-11-16 11:44:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:16,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:16,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733309207] [2022-11-16 11:44:16,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733309207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:16,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:16,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:16,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180374295] [2022-11-16 11:44:16,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:16,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:16,218 INFO L87 Difference]: Start difference. First operand 1604 states and 2558 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:16,271 INFO L93 Difference]: Finished difference Result 1733 states and 2761 transitions. [2022-11-16 11:44:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 11:44:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:16,278 INFO L225 Difference]: With dead ends: 1733 [2022-11-16 11:44:16,279 INFO L226 Difference]: Without dead ends: 1663 [2022-11-16 11:44:16,280 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 [2022-11-16 11:44:16,281 INFO L413 NwaCegarLoop]: 1523 mSDtfsCounter, 1474 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:16,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 1575 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-11-16 11:44:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2022-11-16 11:44:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1659 states have (on average 1.5949367088607596) internal successors, (2646), 1660 states have internal predecessors, (2646), 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) [2022-11-16 11:44:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2646 transitions. [2022-11-16 11:44:16,405 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2646 transitions. Word has length 46 [2022-11-16 11:44:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:16,406 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 2646 transitions. [2022-11-16 11:44:16,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2646 transitions. [2022-11-16 11:44:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:44:16,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:16,408 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] [2022-11-16 11:44:16,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:44:16,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:16,409 INFO L85 PathProgramCache]: Analyzing trace with hash -347694433, now seen corresponding path program 1 times [2022-11-16 11:44:16,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:16,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294918764] [2022-11-16 11:44:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:16,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:16,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294918764] [2022-11-16 11:44:16,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294918764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:16,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:16,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:16,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337343556] [2022-11-16 11:44:16,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:16,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:16,647 INFO L87 Difference]: Start difference. First operand 1661 states and 2646 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:16,829 INFO L93 Difference]: Finished difference Result 1790 states and 2846 transitions. [2022-11-16 11:44:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 11:44:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:16,837 INFO L225 Difference]: With dead ends: 1790 [2022-11-16 11:44:16,837 INFO L226 Difference]: Without dead ends: 1663 [2022-11-16 11:44:16,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:44:16,839 INFO L413 NwaCegarLoop]: 1519 mSDtfsCounter, 1562 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:16,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 1733 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-11-16 11:44:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2022-11-16 11:44:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1659 states have (on average 1.5937311633514166) internal successors, (2644), 1660 states have internal predecessors, (2644), 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) [2022-11-16 11:44:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2644 transitions. [2022-11-16 11:44:16,899 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2644 transitions. Word has length 46 [2022-11-16 11:44:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:16,899 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 2644 transitions. [2022-11-16 11:44:16,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2644 transitions. [2022-11-16 11:44:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:44:16,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:16,901 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] [2022-11-16 11:44:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:44:16,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1691651312, now seen corresponding path program 1 times [2022-11-16 11:44:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:16,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139690341] [2022-11-16 11:44:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:17,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139690341] [2022-11-16 11:44:17,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139690341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:17,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:17,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:44:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521411448] [2022-11-16 11:44:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:17,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:17,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:17,152 INFO L87 Difference]: Start difference. First operand 1661 states and 2644 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2022-11-16 11:44:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:17,268 INFO L93 Difference]: Finished difference Result 1785 states and 2831 transitions. [2022-11-16 11:44:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 47 [2022-11-16 11:44:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:17,277 INFO L225 Difference]: With dead ends: 1785 [2022-11-16 11:44:17,277 INFO L226 Difference]: Without dead ends: 1783 [2022-11-16 11:44:17,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:44:17,279 INFO L413 NwaCegarLoop]: 1573 mSDtfsCounter, 142 mSDsluCounter, 4577 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 6150 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:17,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 6150 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-11-16 11:44:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1667. [2022-11-16 11:44:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.590990990990991) internal successors, (2649), 1666 states have internal predecessors, (2649), 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) [2022-11-16 11:44:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2649 transitions. [2022-11-16 11:44:17,342 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2649 transitions. Word has length 47 [2022-11-16 11:44:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:17,344 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2649 transitions. [2022-11-16 11:44:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2022-11-16 11:44:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2649 transitions. [2022-11-16 11:44:17,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:44:17,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:17,347 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] [2022-11-16 11:44:17,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:44:17,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1538886047, now seen corresponding path program 1 times [2022-11-16 11:44:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480276318] [2022-11-16 11:44:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:17,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:17,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480276318] [2022-11-16 11:44:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480276318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:17,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212298757] [2022-11-16 11:44:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:17,482 INFO L87 Difference]: Start difference. First operand 1667 states and 2649 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:17,548 INFO L93 Difference]: Finished difference Result 1813 states and 2870 transitions. [2022-11-16 11:44:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:17,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 11:44:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:17,557 INFO L225 Difference]: With dead ends: 1813 [2022-11-16 11:44:17,557 INFO L226 Difference]: Without dead ends: 1737 [2022-11-16 11:44:17,558 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 [2022-11-16 11:44:17,559 INFO L413 NwaCegarLoop]: 1567 mSDtfsCounter, 1486 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:17,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1625 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-11-16 11:44:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1735. [2022-11-16 11:44:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1733 states have (on average 1.5868436237738026) internal successors, (2750), 1734 states have internal predecessors, (2750), 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) [2022-11-16 11:44:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2750 transitions. [2022-11-16 11:44:17,633 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2750 transitions. Word has length 48 [2022-11-16 11:44:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:17,633 INFO L495 AbstractCegarLoop]: Abstraction has 1735 states and 2750 transitions. [2022-11-16 11:44:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2750 transitions. [2022-11-16 11:44:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:44:17,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:17,634 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] [2022-11-16 11:44:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:44:17,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash 561679263, now seen corresponding path program 1 times [2022-11-16 11:44:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:17,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772186711] [2022-11-16 11:44:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:17,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:17,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:17,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772186711] [2022-11-16 11:44:17,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772186711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:17,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:17,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210605173] [2022-11-16 11:44:17,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:17,693 INFO L87 Difference]: Start difference. First operand 1735 states and 2750 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:17,779 INFO L93 Difference]: Finished difference Result 2109 states and 3310 transitions. [2022-11-16 11:44:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 11:44:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:17,787 INFO L225 Difference]: With dead ends: 2109 [2022-11-16 11:44:17,787 INFO L226 Difference]: Without dead ends: 1910 [2022-11-16 11:44:17,789 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 [2022-11-16 11:44:17,789 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1482 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:17,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1482 Valid, 1625 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-16 11:44:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1908. [2022-11-16 11:44:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1906 states have (on average 1.5750262329485833) internal successors, (3002), 1907 states have internal predecessors, (3002), 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) [2022-11-16 11:44:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 3002 transitions. [2022-11-16 11:44:17,878 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 3002 transitions. Word has length 48 [2022-11-16 11:44:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:17,879 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 3002 transitions. [2022-11-16 11:44:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 3002 transitions. [2022-11-16 11:44:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:44:17,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:17,880 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] [2022-11-16 11:44:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:44:17,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1952355169, now seen corresponding path program 1 times [2022-11-16 11:44:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:17,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749081738] [2022-11-16 11:44:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:17,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749081738] [2022-11-16 11:44:17,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749081738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:17,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:17,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547203841] [2022-11-16 11:44:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:17,930 INFO L87 Difference]: Start difference. First operand 1908 states and 3002 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:18,051 INFO L93 Difference]: Finished difference Result 2604 states and 4024 transitions. [2022-11-16 11:44:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 11:44:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:18,060 INFO L225 Difference]: With dead ends: 2604 [2022-11-16 11:44:18,060 INFO L226 Difference]: Without dead ends: 2232 [2022-11-16 11:44:18,061 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 [2022-11-16 11:44:18,062 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 1480 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:18,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1627 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-11-16 11:44:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2230. [2022-11-16 11:44:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2228 states have (on average 1.552064631956912) internal successors, (3458), 2229 states have internal predecessors, (3458), 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) [2022-11-16 11:44:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3458 transitions. [2022-11-16 11:44:18,283 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3458 transitions. Word has length 48 [2022-11-16 11:44:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:18,283 INFO L495 AbstractCegarLoop]: Abstraction has 2230 states and 3458 transitions. [2022-11-16 11:44:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3458 transitions. [2022-11-16 11:44:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:44:18,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:18,284 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] [2022-11-16 11:44:18,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:44:18,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1517819233, now seen corresponding path program 1 times [2022-11-16 11:44:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:18,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519172999] [2022-11-16 11:44:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:18,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519172999] [2022-11-16 11:44:18,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519172999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:18,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:18,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086058199] [2022-11-16 11:44:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:18,366 INFO L87 Difference]: Start difference. First operand 2230 states and 3458 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:18,587 INFO L93 Difference]: Finished difference Result 3522 states and 5308 transitions. [2022-11-16 11:44:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 11:44:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:18,598 INFO L225 Difference]: With dead ends: 3522 [2022-11-16 11:44:18,598 INFO L226 Difference]: Without dead ends: 2828 [2022-11-16 11:44:18,601 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 [2022-11-16 11:44:18,602 INFO L413 NwaCegarLoop]: 1569 mSDtfsCounter, 1484 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:18,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 1631 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-11-16 11:44:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2826. [2022-11-16 11:44:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2824 states have (on average 1.5134560906515582) internal successors, (4274), 2825 states have internal predecessors, (4274), 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) [2022-11-16 11:44:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 4274 transitions. [2022-11-16 11:44:18,855 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 4274 transitions. Word has length 48 [2022-11-16 11:44:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:18,856 INFO L495 AbstractCegarLoop]: Abstraction has 2826 states and 4274 transitions. [2022-11-16 11:44:18,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 4274 transitions. [2022-11-16 11:44:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:44:18,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:18,858 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] [2022-11-16 11:44:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:44:18,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash 879514788, now seen corresponding path program 1 times [2022-11-16 11:44:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361984230] [2022-11-16 11:44:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:19,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361984230] [2022-11-16 11:44:19,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361984230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:19,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:19,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666691391] [2022-11-16 11:44:19,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:19,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:19,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:19,033 INFO L87 Difference]: Start difference. First operand 2826 states and 4274 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:20,036 INFO L93 Difference]: Finished difference Result 7916 states and 11463 transitions. [2022-11-16 11:44:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:20,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-16 11:44:20,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:20,082 INFO L225 Difference]: With dead ends: 7916 [2022-11-16 11:44:20,082 INFO L226 Difference]: Without dead ends: 6986 [2022-11-16 11:44:20,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:20,087 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 4648 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:20,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4648 Valid, 3305 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2022-11-16 11:44:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 3938. [2022-11-16 11:44:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3936 states have (on average 1.4801829268292683) internal successors, (5826), 3937 states have internal predecessors, (5826), 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) [2022-11-16 11:44:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 5826 transitions. [2022-11-16 11:44:20,690 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 5826 transitions. Word has length 65 [2022-11-16 11:44:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:20,691 INFO L495 AbstractCegarLoop]: Abstraction has 3938 states and 5826 transitions. [2022-11-16 11:44:20,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 5826 transitions. [2022-11-16 11:44:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:44:20,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:20,694 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] [2022-11-16 11:44:20,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:44:20,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:20,695 INFO L85 PathProgramCache]: Analyzing trace with hash -97691996, now seen corresponding path program 1 times [2022-11-16 11:44:20,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:20,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003535333] [2022-11-16 11:44:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:20,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003535333] [2022-11-16 11:44:20,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003535333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:20,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:20,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551308064] [2022-11-16 11:44:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:20,873 INFO L87 Difference]: Start difference. First operand 3938 states and 5826 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2022-11-16 11:44:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:22,293 INFO L93 Difference]: Finished difference Result 9204 states and 13271 transitions. [2022-11-16 11:44:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-16 11:44:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:22,312 INFO L225 Difference]: With dead ends: 9204 [2022-11-16 11:44:22,312 INFO L226 Difference]: Without dead ends: 7914 [2022-11-16 11:44:22,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:22,317 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 4682 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4682 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:22,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4682 Valid, 3336 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7914 states. [2022-11-16 11:44:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7914 to 5690. [2022-11-16 11:44:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5688 states have (on average 1.4532348804500703) internal successors, (8266), 5689 states have internal predecessors, (8266), 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) [2022-11-16 11:44:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8266 transitions. [2022-11-16 11:44:23,188 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8266 transitions. Word has length 65 [2022-11-16 11:44:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:23,188 INFO L495 AbstractCegarLoop]: Abstraction has 5690 states and 8266 transitions. [2022-11-16 11:44:23,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2022-11-16 11:44:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8266 transitions. [2022-11-16 11:44:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:44:23,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:23,191 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] [2022-11-16 11:44:23,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:44:23,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1683240868, now seen corresponding path program 1 times [2022-11-16 11:44:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014564052] [2022-11-16 11:44:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:44:23,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014564052] [2022-11-16 11:44:23,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014564052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:23,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:23,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87823165] [2022-11-16 11:44:23,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:23,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:23,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:23,364 INFO L87 Difference]: Start difference. First operand 5690 states and 8266 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:24,530 INFO L93 Difference]: Finished difference Result 10492 states and 15071 transitions. [2022-11-16 11:44:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-16 11:44:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:24,551 INFO L225 Difference]: With dead ends: 10492 [2022-11-16 11:44:24,551 INFO L226 Difference]: Without dead ends: 9202 [2022-11-16 11:44:24,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:24,556 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 4678 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4678 SdHoareTripleChecker+Valid, 3339 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:24,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4678 Valid, 3339 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2022-11-16 11:44:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6978. [2022-11-16 11:44:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 6976 states have (on average 1.442947247706422) internal successors, (10066), 6977 states have internal predecessors, (10066), 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) [2022-11-16 11:44:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 10066 transitions. [2022-11-16 11:44:25,400 INFO L78 Accepts]: Start accepts. Automaton has 6978 states and 10066 transitions. Word has length 65 [2022-11-16 11:44:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:25,401 INFO L495 AbstractCegarLoop]: Abstraction has 6978 states and 10066 transitions. [2022-11-16 11:44:25,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6978 states and 10066 transitions. [2022-11-16 11:44:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:44:25,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:25,404 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] [2022-11-16 11:44:25,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:44:25,404 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2117776804, now seen corresponding path program 1 times [2022-11-16 11:44:25,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:25,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556280652] [2022-11-16 11:44:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:25,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:44:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556280652] [2022-11-16 11:44:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556280652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:25,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:25,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408703431] [2022-11-16 11:44:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:25,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:25,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:25,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:25,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:25,611 INFO L87 Difference]: Start difference. First operand 6978 states and 10066 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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) [2022-11-16 11:44:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:26,956 INFO L93 Difference]: Finished difference Result 11780 states and 16871 transitions. [2022-11-16 11:44:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-16 11:44:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:26,979 INFO L225 Difference]: With dead ends: 11780 [2022-11-16 11:44:26,979 INFO L226 Difference]: Without dead ends: 10490 [2022-11-16 11:44:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:26,984 INFO L413 NwaCegarLoop]: 1573 mSDtfsCounter, 4650 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4650 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:26,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4650 Valid, 3364 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10490 states. [2022-11-16 11:44:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10490 to 8266. [2022-11-16 11:44:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8266 states, 8264 states have (on average 1.435866408518877) internal successors, (11866), 8265 states have internal predecessors, (11866), 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) [2022-11-16 11:44:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8266 states to 8266 states and 11866 transitions. [2022-11-16 11:44:28,034 INFO L78 Accepts]: Start accepts. Automaton has 8266 states and 11866 transitions. Word has length 65 [2022-11-16 11:44:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:28,034 INFO L495 AbstractCegarLoop]: Abstraction has 8266 states and 11866 transitions. [2022-11-16 11:44:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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) [2022-11-16 11:44:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 8266 states and 11866 transitions. [2022-11-16 11:44:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:44:28,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:28,037 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] [2022-11-16 11:44:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:44:28,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash -999421060, now seen corresponding path program 1 times [2022-11-16 11:44:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:28,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345222777] [2022-11-16 11:44:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:28,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:28,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345222777] [2022-11-16 11:44:28,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345222777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:28,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:28,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952504596] [2022-11-16 11:44:28,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:28,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:28,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:28,135 INFO L87 Difference]: Start difference. First operand 8266 states and 11866 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-11-16 11:44:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:28,956 INFO L93 Difference]: Finished difference Result 14998 states and 21284 transitions. [2022-11-16 11:44:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-11-16 11:44:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:28,974 INFO L225 Difference]: With dead ends: 14998 [2022-11-16 11:44:28,974 INFO L226 Difference]: Without dead ends: 8268 [2022-11-16 11:44:28,981 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 [2022-11-16 11:44:28,982 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 37 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:28,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3064 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8268 states. [2022-11-16 11:44:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8268 to 8266. [2022-11-16 11:44:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8266 states, 8264 states have (on average 1.4208615682478218) internal successors, (11742), 8265 states have internal predecessors, (11742), 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) [2022-11-16 11:44:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8266 states to 8266 states and 11742 transitions. [2022-11-16 11:44:29,981 INFO L78 Accepts]: Start accepts. Automaton has 8266 states and 11742 transitions. Word has length 66 [2022-11-16 11:44:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:29,982 INFO L495 AbstractCegarLoop]: Abstraction has 8266 states and 11742 transitions. [2022-11-16 11:44:29,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-11-16 11:44:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 8266 states and 11742 transitions. [2022-11-16 11:44:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 11:44:29,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:29,985 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:29,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:44:29,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1980195300, now seen corresponding path program 1 times [2022-11-16 11:44:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:29,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198474369] [2022-11-16 11:44:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:30,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198474369] [2022-11-16 11:44:30,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198474369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:30,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:30,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:30,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805687558] [2022-11-16 11:44:30,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:30,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:30,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:30,117 INFO L87 Difference]: Start difference. First operand 8266 states and 11742 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-11-16 11:44:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:30,701 INFO L93 Difference]: Finished difference Result 10839 states and 15326 transitions. [2022-11-16 11:44:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2022-11-16 11:44:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:30,713 INFO L225 Difference]: With dead ends: 10839 [2022-11-16 11:44:30,714 INFO L226 Difference]: Without dead ends: 4109 [2022-11-16 11:44:30,722 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 [2022-11-16 11:44:30,723 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 31 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:30,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3061 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2022-11-16 11:44:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 4101. [2022-11-16 11:44:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4099 states have (on average 1.4591363747255428) internal successors, (5981), 4100 states have internal predecessors, (5981), 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) [2022-11-16 11:44:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 5981 transitions. [2022-11-16 11:44:31,293 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 5981 transitions. Word has length 67 [2022-11-16 11:44:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:31,293 INFO L495 AbstractCegarLoop]: Abstraction has 4101 states and 5981 transitions. [2022-11-16 11:44:31,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-11-16 11:44:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 5981 transitions. [2022-11-16 11:44:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:44:31,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:31,295 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] [2022-11-16 11:44:31,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:44:31,295 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 823701102, now seen corresponding path program 1 times [2022-11-16 11:44:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:31,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115983540] [2022-11-16 11:44:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115983540] [2022-11-16 11:44:31,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115983540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:31,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:31,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:31,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113583313] [2022-11-16 11:44:31,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:31,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:31,400 INFO L87 Difference]: Start difference. First operand 4101 states and 5981 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-11-16 11:44:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:31,635 INFO L93 Difference]: Finished difference Result 5381 states and 7743 transitions. [2022-11-16 11:44:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2022-11-16 11:44:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:31,641 INFO L225 Difference]: With dead ends: 5381 [2022-11-16 11:44:31,642 INFO L226 Difference]: Without dead ends: 2827 [2022-11-16 11:44:31,645 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 [2022-11-16 11:44:31,646 INFO L413 NwaCegarLoop]: 1543 mSDtfsCounter, 33 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:31,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3040 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-11-16 11:44:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2825. [2022-11-16 11:44:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2823 states have (on average 1.4874247254693589) internal successors, (4199), 2824 states have internal predecessors, (4199), 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) [2022-11-16 11:44:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4199 transitions. [2022-11-16 11:44:31,825 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4199 transitions. Word has length 68 [2022-11-16 11:44:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:31,826 INFO L495 AbstractCegarLoop]: Abstraction has 2825 states and 4199 transitions. [2022-11-16 11:44:31,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-11-16 11:44:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4199 transitions. [2022-11-16 11:44:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 11:44:31,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:31,827 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:44:31,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash -447735840, now seen corresponding path program 1 times [2022-11-16 11:44:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:31,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323001365] [2022-11-16 11:44:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:31,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:31,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323001365] [2022-11-16 11:44:31,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323001365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:31,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:31,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:31,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968124349] [2022-11-16 11:44:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:31,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:31,923 INFO L87 Difference]: Start difference. First operand 2825 states and 4199 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:32,067 INFO L93 Difference]: Finished difference Result 3467 states and 5070 transitions. [2022-11-16 11:44:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-16 11:44:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:32,072 INFO L225 Difference]: With dead ends: 3467 [2022-11-16 11:44:32,072 INFO L226 Difference]: Without dead ends: 2189 [2022-11-16 11:44:32,075 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 [2022-11-16 11:44:32,075 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 30 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:32,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3025 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-11-16 11:44:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2022-11-16 11:44:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.5189931350114416) internal successors, (3319), 2186 states have internal predecessors, (3319), 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) [2022-11-16 11:44:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3319 transitions. [2022-11-16 11:44:32,256 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3319 transitions. Word has length 70 [2022-11-16 11:44:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:32,256 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3319 transitions. [2022-11-16 11:44:32,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3319 transitions. [2022-11-16 11:44:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 11:44:32,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:32,258 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:32,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:44:32,259 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash -164665390, now seen corresponding path program 1 times [2022-11-16 11:44:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:32,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707112306] [2022-11-16 11:44:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707112306] [2022-11-16 11:44:32,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707112306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517536285] [2022-11-16 11:44:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:32,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:32,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:44:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:44:32,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:32,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:33,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517536285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:33,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:33,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-16 11:44:33,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868602264] [2022-11-16 11:44:33,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:33,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:44:33,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:33,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:44:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:33,285 INFO L87 Difference]: Start difference. First operand 2187 states and 3319 transitions. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 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) [2022-11-16 11:44:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:33,802 INFO L93 Difference]: Finished difference Result 3702 states and 5316 transitions. [2022-11-16 11:44:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 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 72 [2022-11-16 11:44:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:33,808 INFO L225 Difference]: With dead ends: 3702 [2022-11-16 11:44:33,809 INFO L226 Difference]: Without dead ends: 3062 [2022-11-16 11:44:33,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:44:33,811 INFO L413 NwaCegarLoop]: 1521 mSDtfsCounter, 3028 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 4713 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:33,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3028 Valid, 4713 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2022-11-16 11:44:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2995. [2022-11-16 11:44:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2993 states have (on average 1.4447043100567991) internal successors, (4324), 2994 states have internal predecessors, (4324), 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) [2022-11-16 11:44:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 4324 transitions. [2022-11-16 11:44:34,188 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 4324 transitions. Word has length 72 [2022-11-16 11:44:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:34,188 INFO L495 AbstractCegarLoop]: Abstraction has 2995 states and 4324 transitions. [2022-11-16 11:44:34,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 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) [2022-11-16 11:44:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 4324 transitions. [2022-11-16 11:44:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:44:34,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:34,190 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:34,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:34,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:34,396 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash -790906490, now seen corresponding path program 1 times [2022-11-16 11:44:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:34,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058052987] [2022-11-16 11:44:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058052987] [2022-11-16 11:44:35,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058052987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409069474] [2022-11-16 11:44:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:35,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:35,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:44:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:44:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:35,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409069474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:37,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-16 11:44:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834263341] [2022-11-16 11:44:37,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:44:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:44:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:44:37,207 INFO L87 Difference]: Start difference. First operand 2995 states and 4324 transitions. Second operand has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 20 states have internal predecessors, (151), 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) [2022-11-16 11:44:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:38,790 INFO L93 Difference]: Finished difference Result 6525 states and 8874 transitions. [2022-11-16 11:44:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:44:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 20 states have internal predecessors, (151), 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 73 [2022-11-16 11:44:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:38,799 INFO L225 Difference]: With dead ends: 6525 [2022-11-16 11:44:38,799 INFO L226 Difference]: Without dead ends: 5167 [2022-11-16 11:44:38,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:44:38,803 INFO L413 NwaCegarLoop]: 1511 mSDtfsCounter, 12200 mSDsluCounter, 4882 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12200 SdHoareTripleChecker+Valid, 6393 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:38,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12200 Valid, 6393 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:44:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2022-11-16 11:44:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 4273. [2022-11-16 11:44:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4271 states have (on average 1.3889018965113558) internal successors, (5932), 4272 states have internal predecessors, (5932), 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) [2022-11-16 11:44:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5932 transitions. [2022-11-16 11:44:39,287 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5932 transitions. Word has length 73 [2022-11-16 11:44:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:39,287 INFO L495 AbstractCegarLoop]: Abstraction has 4273 states and 5932 transitions. [2022-11-16 11:44:39,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 20 states have internal predecessors, (151), 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) [2022-11-16 11:44:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5932 transitions. [2022-11-16 11:44:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:44:39,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:39,289 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:39,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:39,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:39,491 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1677867256, now seen corresponding path program 1 times [2022-11-16 11:44:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:39,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429194967] [2022-11-16 11:44:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:39,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:39,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429194967] [2022-11-16 11:44:39,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429194967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550159631] [2022-11-16 11:44:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:39,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:39,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:39,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:40,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:44:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:44:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:41,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:42,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550159631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:42,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:42,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-16 11:44:42,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274676758] [2022-11-16 11:44:42,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:42,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:44:42,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:44:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:44:42,512 INFO L87 Difference]: Start difference. First operand 4273 states and 5932 transitions. Second operand has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 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) [2022-11-16 11:44:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:45,595 INFO L93 Difference]: Finished difference Result 11729 states and 15325 transitions. [2022-11-16 11:44:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:44:45,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 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 73 [2022-11-16 11:44:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:45,611 INFO L225 Difference]: With dead ends: 11729 [2022-11-16 11:44:45,611 INFO L226 Difference]: Without dead ends: 9216 [2022-11-16 11:44:45,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=514, Invalid=1648, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:44:45,617 INFO L413 NwaCegarLoop]: 1516 mSDtfsCounter, 16955 mSDsluCounter, 7845 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16955 SdHoareTripleChecker+Valid, 9361 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16955 Valid, 9361 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:44:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2022-11-16 11:44:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 6980. [2022-11-16 11:44:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6980 states, 6978 states have (on average 1.3311837202636858) internal successors, (9289), 6979 states have internal predecessors, (9289), 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) [2022-11-16 11:44:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6980 states to 6980 states and 9289 transitions. [2022-11-16 11:44:46,792 INFO L78 Accepts]: Start accepts. Automaton has 6980 states and 9289 transitions. Word has length 73 [2022-11-16 11:44:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:46,792 INFO L495 AbstractCegarLoop]: Abstraction has 6980 states and 9289 transitions. [2022-11-16 11:44:46,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 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) [2022-11-16 11:44:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6980 states and 9289 transitions. [2022-11-16 11:44:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:44:46,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:46,794 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:46,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:44:47,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:47,000 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2137928712, now seen corresponding path program 1 times [2022-11-16 11:44:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606701259] [2022-11-16 11:44:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:48,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606701259] [2022-11-16 11:44:48,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606701259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293967939] [2022-11-16 11:44:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:48,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:48,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:48,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:48,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:44:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:44:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:49,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:51,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293967939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:51,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:51,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-11-16 11:44:51,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76142066] [2022-11-16 11:44:51,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:51,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:44:51,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:44:51,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:44:51,479 INFO L87 Difference]: Start difference. First operand 6980 states and 9289 transitions. Second operand has 32 states, 32 states have (on average 6.28125) internal successors, (201), 32 states have internal predecessors, (201), 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) [2022-11-16 11:44:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:56,529 INFO L93 Difference]: Finished difference Result 20895 states and 26354 transitions. [2022-11-16 11:44:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:44:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.28125) internal successors, (201), 32 states have internal predecessors, (201), 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 73 [2022-11-16 11:44:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:56,555 INFO L225 Difference]: With dead ends: 20895 [2022-11-16 11:44:56,555 INFO L226 Difference]: Without dead ends: 16590 [2022-11-16 11:44:56,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:44:56,563 INFO L413 NwaCegarLoop]: 1512 mSDtfsCounter, 17019 mSDsluCounter, 6318 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17019 SdHoareTripleChecker+Valid, 7830 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:56,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17019 Valid, 7830 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:44:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16590 states. [2022-11-16 11:44:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16590 to 12243. [2022-11-16 11:44:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12243 states, 12241 states have (on average 1.284045421125725) internal successors, (15718), 12242 states have internal predecessors, (15718), 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) [2022-11-16 11:44:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12243 states to 12243 states and 15718 transitions. [2022-11-16 11:44:58,787 INFO L78 Accepts]: Start accepts. Automaton has 12243 states and 15718 transitions. Word has length 73 [2022-11-16 11:44:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:58,787 INFO L495 AbstractCegarLoop]: Abstraction has 12243 states and 15718 transitions. [2022-11-16 11:44:58,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.28125) internal successors, (201), 32 states have internal predecessors, (201), 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) [2022-11-16 11:44:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 12243 states and 15718 transitions. [2022-11-16 11:44:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 11:44:58,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:58,789 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:44:58,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:58,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 11:44:58,995 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:58,996 INFO L85 PathProgramCache]: Analyzing trace with hash -416241244, now seen corresponding path program 1 times [2022-11-16 11:44:58,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:58,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543980469] [2022-11-16 11:44:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:58,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:59,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:59,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543980469] [2022-11-16 11:44:59,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543980469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792341232] [2022-11-16 11:44:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:59,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:59,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:44:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:44:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:00,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:01,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792341232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:01,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:01,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-16 11:45:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104501939] [2022-11-16 11:45:01,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:01,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:45:01,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:45:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:45:01,280 INFO L87 Difference]: Start difference. First operand 12243 states and 15718 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 20 states have internal predecessors, (157), 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) [2022-11-16 11:45:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:08,989 INFO L93 Difference]: Finished difference Result 41566 states and 52376 transitions. [2022-11-16 11:45:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:45:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 20 states have internal predecessors, (157), 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 74 [2022-11-16 11:45:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:09,027 INFO L225 Difference]: With dead ends: 41566 [2022-11-16 11:45:09,028 INFO L226 Difference]: Without dead ends: 32405 [2022-11-16 11:45:09,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:45:09,037 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 15299 mSDsluCounter, 3334 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15299 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:09,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15299 Valid, 4868 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:45:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32405 states. [2022-11-16 11:45:14,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32405 to 22797. [2022-11-16 11:45:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22797 states, 22795 states have (on average 1.252116692257074) internal successors, (28542), 22796 states have internal predecessors, (28542), 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) [2022-11-16 11:45:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22797 states to 22797 states and 28542 transitions. [2022-11-16 11:45:14,355 INFO L78 Accepts]: Start accepts. Automaton has 22797 states and 28542 transitions. Word has length 74 [2022-11-16 11:45:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:14,356 INFO L495 AbstractCegarLoop]: Abstraction has 22797 states and 28542 transitions. [2022-11-16 11:45:14,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 20 states have internal predecessors, (157), 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) [2022-11-16 11:45:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22797 states and 28542 transitions. [2022-11-16 11:45:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 11:45:14,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:14,359 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:45:14,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 11:45:14,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 11:45:14,564 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1997806360, now seen corresponding path program 1 times [2022-11-16 11:45:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:14,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839531781] [2022-11-16 11:45:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:14,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839531781] [2022-11-16 11:45:15,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839531781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359536189] [2022-11-16 11:45:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:15,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:15,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:45:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:45:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:17,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:19,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359536189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:19,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:19,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 37 [2022-11-16 11:45:19,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483768221] [2022-11-16 11:45:19,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:45:19,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:45:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:45:19,435 INFO L87 Difference]: Start difference. First operand 22797 states and 28542 transitions. Second operand has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2022-11-16 11:46:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:19,662 INFO L93 Difference]: Finished difference Result 73588 states and 89970 transitions. [2022-11-16 11:46:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-11-16 11:46:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-16 11:46:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:19,756 INFO L225 Difference]: With dead ends: 73588 [2022-11-16 11:46:19,756 INFO L226 Difference]: Without dead ends: 64390 [2022-11-16 11:46:19,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24071 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=8666, Invalid=49656, Unknown=0, NotChecked=0, Total=58322 [2022-11-16 11:46:19,779 INFO L413 NwaCegarLoop]: 1738 mSDtfsCounter, 15993 mSDsluCounter, 24866 mSDsCounter, 0 mSdLazyCounter, 3210 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15993 SdHoareTripleChecker+Valid, 26604 SdHoareTripleChecker+Invalid, 3385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 3210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:19,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15993 Valid, 26604 Invalid, 3385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [175 Valid, 3210 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 11:46:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64390 states. [2022-11-16 11:46:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64390 to 20382. [2022-11-16 11:46:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20382 states, 20380 states have (on average 1.254072620215898) internal successors, (25558), 20381 states have internal predecessors, (25558), 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) [2022-11-16 11:46:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20382 states to 20382 states and 25558 transitions. [2022-11-16 11:46:26,918 INFO L78 Accepts]: Start accepts. Automaton has 20382 states and 25558 transitions. Word has length 75 [2022-11-16 11:46:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:26,919 INFO L495 AbstractCegarLoop]: Abstraction has 20382 states and 25558 transitions. [2022-11-16 11:46:26,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 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) [2022-11-16 11:46:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 20382 states and 25558 transitions. [2022-11-16 11:46:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 11:46:26,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:26,920 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:46:26,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:27,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:27,123 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:46:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash 19060712, now seen corresponding path program 1 times [2022-11-16 11:46:27,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:27,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290674979] [2022-11-16 11:46:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:27,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290674979] [2022-11-16 11:46:28,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290674979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819324212] [2022-11-16 11:46:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:28,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:28,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:46:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:46:28,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:32,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:39,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819324212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:39,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:39,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 19] total 49 [2022-11-16 11:46:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379960295] [2022-11-16 11:46:39,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:39,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 11:46:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 11:46:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:46:39,480 INFO L87 Difference]: Start difference. First operand 20382 states and 25558 transitions. Second operand has 49 states, 49 states have (on average 4.061224489795919) internal successors, (199), 49 states have internal predecessors, (199), 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) [2022-11-16 11:49:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:38,012 INFO L93 Difference]: Finished difference Result 86778 states and 106018 transitions. [2022-11-16 11:49:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-11-16 11:49:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.061224489795919) internal successors, (199), 49 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-16 11:49:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:38,140 INFO L225 Difference]: With dead ends: 86778 [2022-11-16 11:49:38,140 INFO L226 Difference]: Without dead ends: 77058 [2022-11-16 11:49:38,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42270 ImplicationChecksByTransitivity, 131.7s TimeCoverageRelationStatistics Valid=16145, Invalid=79027, Unknown=0, NotChecked=0, Total=95172 [2022-11-16 11:49:38,171 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 24608 mSDsluCounter, 20330 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24608 SdHoareTripleChecker+Valid, 21877 SdHoareTripleChecker+Invalid, 4500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:38,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24608 Valid, 21877 Invalid, 4500 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [162 Valid, 4338 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-16 11:49:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77058 states. [2022-11-16 11:49:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77058 to 21055. [2022-11-16 11:49:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21055 states, 21053 states have (on average 1.25302807200874) internal successors, (26380), 21054 states have internal predecessors, (26380), 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) [2022-11-16 11:49:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21055 states to 21055 states and 26380 transitions. [2022-11-16 11:49:47,813 INFO L78 Accepts]: Start accepts. Automaton has 21055 states and 26380 transitions. Word has length 75 [2022-11-16 11:49:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:47,813 INFO L495 AbstractCegarLoop]: Abstraction has 21055 states and 26380 transitions. [2022-11-16 11:49:47,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.061224489795919) internal successors, (199), 49 states have internal predecessors, (199), 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) [2022-11-16 11:49:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21055 states and 26380 transitions. [2022-11-16 11:49:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:49:47,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:47,815 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:49:47,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:48,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:48,016 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1754579942, now seen corresponding path program 1 times [2022-11-16 11:49:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:48,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325401468] [2022-11-16 11:49:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:48,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:48,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325401468] [2022-11-16 11:49:48,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325401468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:48,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605233576] [2022-11-16 11:49:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:48,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:48,924 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:48,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:49:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:49:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:50,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:51,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605233576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:51,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:51,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-11-16 11:49:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227396266] [2022-11-16 11:49:51,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:51,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:49:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:49:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:49:51,716 INFO L87 Difference]: Start difference. First operand 21055 states and 26380 transitions. Second operand has 31 states, 31 states have (on average 6.290322580645161) internal successors, (195), 31 states have internal predecessors, (195), 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) [2022-11-16 11:50:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:21,815 INFO L93 Difference]: Finished difference Result 49806 states and 61505 transitions. [2022-11-16 11:50:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:50:21,816 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.290322580645161) internal successors, (195), 31 states have internal predecessors, (195), 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 77 [2022-11-16 11:50:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:21,862 INFO L225 Difference]: With dead ends: 49806 [2022-11-16 11:50:21,863 INFO L226 Difference]: Without dead ends: 41564 [2022-11-16 11:50:21,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=666, Invalid=2414, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 11:50:21,872 INFO L413 NwaCegarLoop]: 1569 mSDtfsCounter, 13223 mSDsluCounter, 17363 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13223 SdHoareTripleChecker+Valid, 18932 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:21,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13223 Valid, 18932 Invalid, 1213 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:50:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41564 states. [2022-11-16 11:50:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41564 to 17644. [2022-11-16 11:50:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 17642 states have (on average 1.2570570230132638) internal successors, (22177), 17643 states have internal predecessors, (22177), 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) [2022-11-16 11:50:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22177 transitions. [2022-11-16 11:50:30,500 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22177 transitions. Word has length 77 [2022-11-16 11:50:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:30,500 INFO L495 AbstractCegarLoop]: Abstraction has 17644 states and 22177 transitions. [2022-11-16 11:50:30,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.290322580645161) internal successors, (195), 31 states have internal predecessors, (195), 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) [2022-11-16 11:50:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22177 transitions. [2022-11-16 11:50:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:50:30,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:30,502 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:50:30,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 11:50:30,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:50:30,708 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash 823031838, now seen corresponding path program 1 times [2022-11-16 11:50:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:30,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107615286] [2022-11-16 11:50:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:31,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:31,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107615286] [2022-11-16 11:50:31,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107615286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:31,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232927352] [2022-11-16 11:50:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:31,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:31,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:31,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:50:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:50:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:33,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:35,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232927352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:35,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:35,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-16 11:50:35,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309771388] [2022-11-16 11:50:35,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:50:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:50:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:50:35,984 INFO L87 Difference]: Start difference. First operand 17644 states and 22177 transitions. Second operand has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 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) [2022-11-16 11:50:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:53,526 INFO L93 Difference]: Finished difference Result 27477 states and 34526 transitions. [2022-11-16 11:50:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:50:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 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 77 [2022-11-16 11:50:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:53,544 INFO L225 Difference]: With dead ends: 27477 [2022-11-16 11:50:53,544 INFO L226 Difference]: Without dead ends: 19965 [2022-11-16 11:50:53,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:50:53,549 INFO L413 NwaCegarLoop]: 1519 mSDtfsCounter, 12158 mSDsluCounter, 14976 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12158 SdHoareTripleChecker+Valid, 16495 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:53,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12158 Valid, 16495 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:50:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19965 states. [2022-11-16 11:51:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19965 to 11502. [2022-11-16 11:51:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11502 states, 11500 states have (on average 1.2704347826086957) internal successors, (14610), 11501 states have internal predecessors, (14610), 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) [2022-11-16 11:51:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11502 states to 11502 states and 14610 transitions. [2022-11-16 11:51:00,322 INFO L78 Accepts]: Start accepts. Automaton has 11502 states and 14610 transitions. Word has length 77 [2022-11-16 11:51:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:00,322 INFO L495 AbstractCegarLoop]: Abstraction has 11502 states and 14610 transitions. [2022-11-16 11:51:00,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.137931034482759) internal successors, (178), 29 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) [2022-11-16 11:51:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11502 states and 14610 transitions. [2022-11-16 11:51:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 11:51:00,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:00,324 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:51:00,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:51:00,530 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -911151437, now seen corresponding path program 1 times [2022-11-16 11:51:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:00,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563515188] [2022-11-16 11:51:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:00,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:00,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563515188] [2022-11-16 11:51:00,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563515188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:00,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:00,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:51:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958082083] [2022-11-16 11:51:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:00,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:51:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:51:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:51:00,764 INFO L87 Difference]: Start difference. First operand 11502 states and 14610 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-16 11:51:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:11,732 INFO L93 Difference]: Finished difference Result 13767 states and 18015 transitions. [2022-11-16 11:51:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:51:11,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2022-11-16 11:51:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:11,748 INFO L225 Difference]: With dead ends: 13767 [2022-11-16 11:51:11,748 INFO L226 Difference]: Without dead ends: 12263 [2022-11-16 11:51:11,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:51:11,752 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 1451 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:11,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1451 Valid, 1817 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 11:51:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2022-11-16 11:51:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 12253. [2022-11-16 11:51:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12253 states, 12251 states have (on average 1.2543465839523305) internal successors, (15367), 12252 states have internal predecessors, (15367), 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) [2022-11-16 11:51:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12253 states to 12253 states and 15367 transitions. [2022-11-16 11:51:20,113 INFO L78 Accepts]: Start accepts. Automaton has 12253 states and 15367 transitions. Word has length 95 [2022-11-16 11:51:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 12253 states and 15367 transitions. [2022-11-16 11:51:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-16 11:51:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 12253 states and 15367 transitions. [2022-11-16 11:51:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 11:51:20,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:20,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-16 11:51:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 11:51:20,119 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash -987114242, now seen corresponding path program 1 times [2022-11-16 11:51:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545420222] [2022-11-16 11:51:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:21,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545420222] [2022-11-16 11:51:21,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545420222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321667349] [2022-11-16 11:51:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:21,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:21,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:21,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:51:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:51:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 26 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:37,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:40,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321667349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:40,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:40,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-11-16 11:51:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450334019] [2022-11-16 11:51:40,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:51:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:51:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=753, Unknown=3, NotChecked=0, Total=870 [2022-11-16 11:51:40,290 INFO L87 Difference]: Start difference. First operand 12253 states and 15367 transitions. Second operand has 30 states, 30 states have (on average 9.833333333333334) internal successors, (295), 29 states have internal predecessors, (295), 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) [2022-11-16 11:57:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:32,127 INFO L93 Difference]: Finished difference Result 66303 states and 80329 transitions. [2022-11-16 11:57:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-16 11:57:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 9.833333333333334) internal successors, (295), 29 states have internal predecessors, (295), 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 119 [2022-11-16 11:57:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:32,201 INFO L225 Difference]: With dead ends: 66303 [2022-11-16 11:57:32,201 INFO L226 Difference]: Without dead ends: 62207 [2022-11-16 11:57:32,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5851 ImplicationChecksByTransitivity, 302.5s TimeCoverageRelationStatistics Valid=3075, Invalid=14126, Unknown=91, NotChecked=0, Total=17292 [2022-11-16 11:57:32,216 INFO L413 NwaCegarLoop]: 1664 mSDtfsCounter, 17879 mSDsluCounter, 13258 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17879 SdHoareTripleChecker+Valid, 14922 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 840 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:32,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17879 Valid, 14922 Invalid, 2513 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [54 Valid, 1619 Invalid, 0 Unknown, 840 Unchecked, 3.5s Time] [2022-11-16 11:57:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62207 states. [2022-11-16 11:57:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62207 to 23628. [2022-11-16 11:57:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23628 states, 23626 states have (on average 1.2424870904935241) internal successors, (29355), 23627 states have internal predecessors, (29355), 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) [2022-11-16 11:57:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23628 states to 23628 states and 29355 transitions. [2022-11-16 11:57:49,695 INFO L78 Accepts]: Start accepts. Automaton has 23628 states and 29355 transitions. Word has length 119 [2022-11-16 11:57:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:49,695 INFO L495 AbstractCegarLoop]: Abstraction has 23628 states and 29355 transitions. [2022-11-16 11:57:49,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.833333333333334) internal successors, (295), 29 states have internal predecessors, (295), 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) [2022-11-16 11:57:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 23628 states and 29355 transitions. [2022-11-16 11:57:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 11:57:49,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:49,700 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 11:57:49,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:49,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:57:49,906 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash -7975568, now seen corresponding path program 1 times [2022-11-16 11:57:49,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:49,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108044764] [2022-11-16 11:57:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:50,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108044764] [2022-11-16 11:57:50,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108044764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177477397] [2022-11-16 11:57:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:50,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:50,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:50,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:50,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0222991c-1676-4a22-9fa0-f62f213a38ad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:57:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:57:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 48 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:58,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 42 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:02,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177477397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:02,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:02,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-11-16 11:58:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610277681] [2022-11-16 11:58:02,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:02,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:58:02,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:58:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=930, Unknown=2, NotChecked=0, Total=1056 [2022-11-16 11:58:02,152 INFO L87 Difference]: Start difference. First operand 23628 states and 29355 transitions. Second operand has 33 states, 33 states have (on average 9.727272727272727) internal successors, (321), 32 states have internal predecessors, (321), 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)