./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro --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 d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 --- 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-8393723 [2022-11-18 18:40:36,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:40:36,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:40:36,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:40:36,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:40:36,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:40:36,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:40:36,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:40:36,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:40:36,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:40:36,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:40:36,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:40:36,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:40:36,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:40:36,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:40:36,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:40:36,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:40:36,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:40:36,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:40:36,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:40:36,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:40:36,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:40:36,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:40:36,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:40:36,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:40:36,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:40:36,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:40:36,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:40:36,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:40:36,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:40:36,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:40:36,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:40:36,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:40:36,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:40:36,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:40:36,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:40:36,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:40:36,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:40:36,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:40:36,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:40:36,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:40:36,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:40:36,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:40:36,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:40:36,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:40:36,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:40:36,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:40:36,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:40:36,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:40:36,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:40:36,996 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:40:36,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:40:36,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:40:36,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:40:36,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:40:36,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:40:36,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:40:36,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:40:36,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:40:36,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:40:36,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:40:37,000 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:40:37,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:40:37,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:40:37,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:40:37,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:40:37,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:40:37,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:40:37,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:40:37,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:40:37,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:40:37,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:40:37,005 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:40:37,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:40:37,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:40:37,005 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_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 [2022-11-18 18:40:37,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:40:37,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:40:37,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:40:37,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:40:37,369 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:40:37,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2022-11-18 18:40:37,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/data/defb6b6c4/d5ca0a689a9842d6930361400a77faea/FLAG510877415 [2022-11-18 18:40:37,971 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:40:37,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2022-11-18 18:40:37,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/data/defb6b6c4/d5ca0a689a9842d6930361400a77faea/FLAG510877415 [2022-11-18 18:40:38,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/data/defb6b6c4/d5ca0a689a9842d6930361400a77faea [2022-11-18 18:40:38,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:40:38,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:40:38,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:40:38,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:40:38,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:40:38,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1faece4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38, skipping insertion in model container [2022-11-18 18:40:38,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:40:38,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:40:38,620 WARN L234 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_19e08eb5-357c-4fa5-b86b-e87f767fd45e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] [2022-11-18 18:40:38,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:40:38,654 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:40:38,668 WARN L234 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_19e08eb5-357c-4fa5-b86b-e87f767fd45e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] [2022-11-18 18:40:38,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:40:38,694 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:40:38,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38 WrapperNode [2022-11-18 18:40:38,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:40:38,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:40:38,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:40:38,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:40:38,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,759 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-18 18:40:38,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:40:38,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:40:38,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:40:38,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:40:38,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:40:38,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:40:38,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:40:38,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:40:38,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (1/1) ... [2022-11-18 18:40:38,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:40:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:38,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:40:38,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:40:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:40:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:40:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:40:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:40:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:40:38,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:40:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:40:38,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:40:39,043 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:40:39,045 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:40:39,295 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:40:39,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:40:39,303 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:40:39,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:40:39 BoogieIcfgContainer [2022-11-18 18:40:39,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:40:39,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:40:39,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:40:39,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:40:39,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:40:38" (1/3) ... [2022-11-18 18:40:39,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a696b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:40:39, skipping insertion in model container [2022-11-18 18:40:39,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:38" (2/3) ... [2022-11-18 18:40:39,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a696b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:40:39, skipping insertion in model container [2022-11-18 18:40:39,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:40:39" (3/3) ... [2022-11-18 18:40:39,345 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2022-11-18 18:40:39,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:40:39,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:40:39,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:40:39,507 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;@14a463d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:40:39,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:40:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:40:39,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:39,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:39,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2022-11-18 18:40:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:39,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975539042] [2022-11-18 18:40:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:39,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:39,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:39,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344020000] [2022-11-18 18:40:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:39,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:39,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:39,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:40:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 18:40:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:39,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:40:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975539042] [2022-11-18 18:40:39,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:39,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344020000] [2022-11-18 18:40:39,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344020000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:39,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:39,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:40:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727426520] [2022-11-18 18:40:39,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:39,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:40:39,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:40:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:40:39,899 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:39,928 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-18 18:40:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:40:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-18 18:40:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:39,941 INFO L225 Difference]: With dead ends: 41 [2022-11-18 18:40:39,941 INFO L226 Difference]: Without dead ends: 18 [2022-11-18 18:40:39,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:40:39,957 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:39,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:40:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-18 18:40:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-18 18:40:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-18 18:40:40,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-11-18 18:40:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:40,014 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-18 18:40:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-18 18:40:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:40:40,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:40,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:40,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:40,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 18:40:40,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2022-11-18 18:40:40,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:40,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147758300] [2022-11-18 18:40:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:40,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:40,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113021148] [2022-11-18 18:40:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:40,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:40,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:40,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:40,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:40:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:40:40,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:40,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:40:40,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147758300] [2022-11-18 18:40:40,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:40,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113021148] [2022-11-18 18:40:40,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113021148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:40,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:40,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:40:40,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451561659] [2022-11-18 18:40:40,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:40,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:40:40,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:40:40,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:40:40,446 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:40,546 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-18 18:40:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:40:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-18 18:40:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:40,548 INFO L225 Difference]: With dead ends: 45 [2022-11-18 18:40:40,548 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 18:40:40,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:40:40,550 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:40,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:40:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 18:40:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-18 18:40:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-18 18:40:40,558 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-11-18 18:40:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:40,558 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-18 18:40:40,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-18 18:40:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 18:40:40,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:40,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:40,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:40,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:40,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2022-11-18 18:40:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:40,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534804562] [2022-11-18 18:40:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:40,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678566657] [2022-11-18 18:40:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:40,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:40,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:40,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:40:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:40:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:41,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534804562] [2022-11-18 18:40:41,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678566657] [2022-11-18 18:40:41,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678566657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:41,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:41,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-18 18:40:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258712096] [2022-11-18 18:40:41,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:40:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:40:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:40:41,029 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:41,175 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-11-18 18:40:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:40:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 18:40:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:41,177 INFO L225 Difference]: With dead ends: 73 [2022-11-18 18:40:41,178 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 18:40:41,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:40:41,180 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:41,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 38 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:40:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 18:40:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2022-11-18 18:40:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-18 18:40:41,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 16 [2022-11-18 18:40:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:41,190 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-18 18:40:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-18 18:40:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 18:40:41,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:41,192 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:41,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:41,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:41,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -35725226, now seen corresponding path program 1 times [2022-11-18 18:40:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34669318] [2022-11-18 18:40:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:41,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:41,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99673945] [2022-11-18 18:40:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:41,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:41,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:41,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:40:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:40:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:41,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34669318] [2022-11-18 18:40:41,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99673945] [2022-11-18 18:40:41,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99673945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:41,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:41,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-18 18:40:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882992722] [2022-11-18 18:40:41,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:40:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:40:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:40:41,953 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:42,306 INFO L93 Difference]: Finished difference Result 155 states and 195 transitions. [2022-11-18 18:40:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:40:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 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 31 [2022-11-18 18:40:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:42,309 INFO L225 Difference]: With dead ends: 155 [2022-11-18 18:40:42,309 INFO L226 Difference]: Without dead ends: 137 [2022-11-18 18:40:42,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:40:42,311 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 351 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:42,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 87 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:40:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-18 18:40:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 64. [2022-11-18 18:40:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-18 18:40:42,325 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 31 [2022-11-18 18:40:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:42,325 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-18 18:40:42,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-18 18:40:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 18:40:42,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:42,328 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:42,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:42,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:42,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1147663820, now seen corresponding path program 2 times [2022-11-18 18:40:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:42,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661045881] [2022-11-18 18:40:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:42,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:42,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301763198] [2022-11-18 18:40:42,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:40:42,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:42,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:42,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:42,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:40:42,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:40:42,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:40:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:40:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-18 18:40:43,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:40:43,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661045881] [2022-11-18 18:40:43,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:43,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301763198] [2022-11-18 18:40:43,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301763198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:43,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:43,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:40:43,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717805408] [2022-11-18 18:40:43,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:43,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:40:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:40:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:40:43,412 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:43,519 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-11-18 18:40:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:40:43,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 61 [2022-11-18 18:40:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:43,524 INFO L225 Difference]: With dead ends: 76 [2022-11-18 18:40:43,524 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 18:40:43,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:40:43,527 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:43,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:40:43,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 18:40:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-11-18 18:40:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-11-18 18:40:43,556 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 61 [2022-11-18 18:40:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:43,557 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-11-18 18:40:43,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-11-18 18:40:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 18:40:43,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:43,562 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:43,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:43,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:43,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1147723402, now seen corresponding path program 1 times [2022-11-18 18:40:43,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:43,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78262930] [2022-11-18 18:40:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:43,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:43,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296924332] [2022-11-18 18:40:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:43,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:43,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:43,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:40:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 18:40:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:44,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:44,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78262930] [2022-11-18 18:40:44,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296924332] [2022-11-18 18:40:44,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296924332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:44,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:44,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-18 18:40:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356433620] [2022-11-18 18:40:44,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:40:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:40:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:40:44,763 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:45,625 INFO L93 Difference]: Finished difference Result 463 states and 570 transitions. [2022-11-18 18:40:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 18:40:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 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 61 [2022-11-18 18:40:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:45,629 INFO L225 Difference]: With dead ends: 463 [2022-11-18 18:40:45,629 INFO L226 Difference]: Without dead ends: 424 [2022-11-18 18:40:45,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 18:40:45,631 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 983 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:45,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 184 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:40:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-18 18:40:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 130. [2022-11-18 18:40:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 129 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-11-18 18:40:45,655 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 61 [2022-11-18 18:40:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:45,655 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-11-18 18:40:45,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-11-18 18:40:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-18 18:40:45,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:45,658 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:45,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:45,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:45,866 INFO L85 PathProgramCache]: Analyzing trace with hash 4942966, now seen corresponding path program 2 times [2022-11-18 18:40:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:45,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788284301] [2022-11-18 18:40:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:45,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:45,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544049861] [2022-11-18 18:40:45,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:40:45,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:45,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:45,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:45,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:40:46,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:40:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:40:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:40:46,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2022-11-18 18:40:47,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:40:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788284301] [2022-11-18 18:40:47,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544049861] [2022-11-18 18:40:47,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544049861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:47,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:40:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064887897] [2022-11-18 18:40:47,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:40:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:40:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:40:47,012 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:47,152 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-11-18 18:40:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:40:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 121 [2022-11-18 18:40:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:47,154 INFO L225 Difference]: With dead ends: 143 [2022-11-18 18:40:47,155 INFO L226 Difference]: Without dead ends: 141 [2022-11-18 18:40:47,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:40:47,156 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:47,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:40:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-18 18:40:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-11-18 18:40:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2022-11-18 18:40:47,174 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 121 [2022-11-18 18:40:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:47,174 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2022-11-18 18:40:47,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2022-11-18 18:40:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-18 18:40:47,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:47,177 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:47,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:47,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:40:47,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1531894057, now seen corresponding path program 1 times [2022-11-18 18:40:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111829886] [2022-11-18 18:40:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:47,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:47,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860088834] [2022-11-18 18:40:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:47,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:47,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:47,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:40:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:40:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:40:48,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:40:49,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111829886] [2022-11-18 18:40:49,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860088834] [2022-11-18 18:40:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860088834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:49,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:49,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-18 18:40:49,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214954503] [2022-11-18 18:40:49,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:49,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:40:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:40:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:40:49,690 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:52,395 INFO L93 Difference]: Finished difference Result 1222 states and 1488 transitions. [2022-11-18 18:40:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 18:40:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 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 127 [2022-11-18 18:40:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:52,401 INFO L225 Difference]: With dead ends: 1222 [2022-11-18 18:40:52,401 INFO L226 Difference]: Without dead ends: 1147 [2022-11-18 18:40:52,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 18:40:52,405 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2733 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2733 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:52,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2733 Valid, 374 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 18:40:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-18 18:40:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 256. [2022-11-18 18:40:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2022-11-18 18:40:52,438 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 127 [2022-11-18 18:40:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:52,438 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2022-11-18 18:40:52,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2022-11-18 18:40:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-18 18:40:52,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:52,444 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:52,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 18:40:52,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:40:52,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash -456351959, now seen corresponding path program 2 times [2022-11-18 18:40:52,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:52,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224791633] [2022-11-18 18:40:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:52,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:40:52,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672256556] [2022-11-18 18:40:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:40:52,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:52,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:52,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:52,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:40:53,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:40:53,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:40:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 18:40:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:40:55,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:40:59,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224791633] [2022-11-18 18:40:59,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672256556] [2022-11-18 18:40:59,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672256556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:59,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:59,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-11-18 18:40:59,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376322876] [2022-11-18 18:40:59,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:59,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-18 18:40:59,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-18 18:40:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 18:40:59,033 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:41:09,714 INFO L93 Difference]: Finished difference Result 2482 states and 3024 transitions. [2022-11-18 18:41:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-18 18:41:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 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 247 [2022-11-18 18:41:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:41:09,725 INFO L225 Difference]: With dead ends: 2482 [2022-11-18 18:41:09,726 INFO L226 Difference]: Without dead ends: 2347 [2022-11-18 18:41:09,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-11-18 18:41:09,736 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5623 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5623 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:41:09,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5623 Valid, 762 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 18:41:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-11-18 18:41:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 496. [2022-11-18 18:41:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.2949494949494949) internal successors, (641), 495 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 641 transitions. [2022-11-18 18:41:09,788 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 641 transitions. Word has length 247 [2022-11-18 18:41:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:41:09,789 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 641 transitions. [2022-11-18 18:41:09,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 641 transitions. [2022-11-18 18:41:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-18 18:41:09,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:41:09,804 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:41:09,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 18:41:10,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 18:41:10,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:41:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1703865129, now seen corresponding path program 3 times [2022-11-18 18:41:10,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:10,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987975333] [2022-11-18 18:41:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:10,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:41:10,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102007110] [2022-11-18 18:41:10,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:41:10,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:10,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:10,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:41:10,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:41:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:41:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:41:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:41:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-11-18 18:41:13,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-11-18 18:41:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987975333] [2022-11-18 18:41:17,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:41:17,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102007110] [2022-11-18 18:41:17,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102007110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:17,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:41:17,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-18 18:41:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069538675] [2022-11-18 18:41:17,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:17,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:41:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:41:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:41:17,236 INFO L87 Difference]: Start difference. First operand 496 states and 641 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:41:18,858 INFO L93 Difference]: Finished difference Result 527 states and 680 transitions. [2022-11-18 18:41:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:41:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 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 487 [2022-11-18 18:41:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:41:18,861 INFO L225 Difference]: With dead ends: 527 [2022-11-18 18:41:18,862 INFO L226 Difference]: Without dead ends: 525 [2022-11-18 18:41:18,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:41:18,863 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 261 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:41:18,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 88 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:41:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-18 18:41:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 520. [2022-11-18 18:41:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.2890173410404624) internal successors, (669), 519 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 669 transitions. [2022-11-18 18:41:18,931 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 669 transitions. Word has length 487 [2022-11-18 18:41:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:41:18,934 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 669 transitions. [2022-11-18 18:41:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 669 transitions. [2022-11-18 18:41:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-18 18:41:18,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:41:18,948 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:41:18,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:41:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:41:19,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:41:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1887291253, now seen corresponding path program 4 times [2022-11-18 18:41:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:19,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954278018] [2022-11-18 18:41:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:19,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:19,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:41:19,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776036560] [2022-11-18 18:41:19,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:41:19,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:19,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:19,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:19,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:41:19,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:41:19,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:41:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:41:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:41:19,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-18 18:41:19,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 18:41:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2022-11-18 18:41:19,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2022-11-18 18:41:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954278018] [2022-11-18 18:41:19,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:41:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776036560] [2022-11-18 18:41:19,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776036560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:19,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:41:19,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-18 18:41:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923487572] [2022-11-18 18:41:19,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:19,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:41:19,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:41:19,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:41:19,980 INFO L87 Difference]: Start difference. First operand 520 states and 669 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:41:20,365 INFO L93 Difference]: Finished difference Result 1108 states and 1415 transitions. [2022-11-18 18:41:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:41:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 511 [2022-11-18 18:41:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:41:20,369 INFO L225 Difference]: With dead ends: 1108 [2022-11-18 18:41:20,369 INFO L226 Difference]: Without dead ends: 596 [2022-11-18 18:41:20,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:41:20,372 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:41:20,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:41:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-18 18:41:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 520. [2022-11-18 18:41:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.28131021194605) internal successors, (665), 519 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 665 transitions. [2022-11-18 18:41:20,482 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 665 transitions. Word has length 511 [2022-11-18 18:41:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:41:20,483 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 665 transitions. [2022-11-18 18:41:20,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 665 transitions. [2022-11-18 18:41:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-18 18:41:20,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:41:20,499 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:41:20,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:41:20,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:41:20,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:41:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash 593762805, now seen corresponding path program 1 times [2022-11-18 18:41:20,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097588614] [2022-11-18 18:41:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:20,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:20,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:41:20,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290755028] [2022-11-18 18:41:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:20,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:20,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:20,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:41:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 18:41:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:41:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 18:41:28,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 18:41:39,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:39,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097588614] [2022-11-18 18:41:39,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:41:39,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290755028] [2022-11-18 18:41:39,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290755028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:39,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:41:39,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-11-18 18:41:39,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618232911] [2022-11-18 18:41:39,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:39,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-18 18:41:39,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-18 18:41:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-11-18 18:41:39,380 INFO L87 Difference]: Start difference. First operand 520 states and 665 transitions. Second operand has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:03,784 INFO L93 Difference]: Finished difference Result 9490 states and 11326 transitions. [2022-11-18 18:43:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-18 18:43:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 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 511 [2022-11-18 18:43:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:03,817 INFO L225 Difference]: With dead ends: 9490 [2022-11-18 18:43:03,818 INFO L226 Difference]: Without dead ends: 9211 [2022-11-18 18:43:03,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-11-18 18:43:03,831 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12129 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12129 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:03,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12129 Valid, 1523 Invalid, 2523 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1071 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-18 18:43:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2022-11-18 18:43:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 1000. [2022-11-18 18:43:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 1.2902902902902902) internal successors, (1289), 999 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1289 transitions. [2022-11-18 18:43:03,997 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1289 transitions. Word has length 511 [2022-11-18 18:43:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:03,998 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1289 transitions. [2022-11-18 18:43:03,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1289 transitions. [2022-11-18 18:43:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2022-11-18 18:43:04,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:04,011 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:04,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 18:43:04,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:04,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash 847622645, now seen corresponding path program 2 times [2022-11-18 18:43:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424526008] [2022-11-18 18:43:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:04,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:43:04,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042024377] [2022-11-18 18:43:04,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:43:04,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:04,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:04,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19e08eb5-357c-4fa5-b86b-e87f767fd45e/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:43:05,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:43:05,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:43:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-18 18:43:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90045 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 18:43:29,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 90045 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 18:44:09,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:09,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424526008] [2022-11-18 18:44:09,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:44:09,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042024377] [2022-11-18 18:44:09,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042024377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:09,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:44:09,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2022-11-18 18:44:09,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277056814] [2022-11-18 18:44:09,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-11-18 18:44:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-11-18 18:44:09,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2022-11-18 18:44:09,588 INFO L87 Difference]: Start difference. First operand 1000 states and 1289 transitions. Second operand has 386 states, 386 states have (on average 4.971502590673575) internal successors, (1919), 385 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)