./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:14:07,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:14:07,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:14:07,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:14:07,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:14:07,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:14:07,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:14:07,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:14:07,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:14:07,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:14:07,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:14:07,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:14:07,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:14:07,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:14:07,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:14:07,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:14:07,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:14:07,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:14:07,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:14:07,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:14:07,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:14:07,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:14:07,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:14:07,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:14:08,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:14:08,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:14:08,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:14:08,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:14:08,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:14:08,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:14:08,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:14:08,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:14:08,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:14:08,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:14:08,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:14:08,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:14:08,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:14:08,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:14:08,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:14:08,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:14:08,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:14:08,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:14:08,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:14:08,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:14:08,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:14:08,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:14:08,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:14:08,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:14:08,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:14:08,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:14:08,085 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:14:08,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:14:08,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:14:08,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:14:08,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:14:08,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:14:08,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:14:08,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:14:08,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:14:08,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:14:08,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:14:08,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:14:08,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:14:08,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:14:08,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:14:08,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:14:08,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:14:08,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:14:08,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:14:08,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:14:08,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:14:08,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:14:08,095 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:14:08,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:14:08,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:14:08,096 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_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2022-11-02 20:14:08,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:14:08,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:14:08,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:14:08,578 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:14:08,579 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:14:08,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops/eureka_05.i [2022-11-02 20:14:08,683 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/data/1fa6cd963/9a86eb5c3e014252aa54ecf57443f1a0/FLAGc8a30cb74 [2022-11-02 20:14:09,387 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:14:09,390 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/sv-benchmarks/c/loops/eureka_05.i [2022-11-02 20:14:09,413 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/data/1fa6cd963/9a86eb5c3e014252aa54ecf57443f1a0/FLAGc8a30cb74 [2022-11-02 20:14:09,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/data/1fa6cd963/9a86eb5c3e014252aa54ecf57443f1a0 [2022-11-02 20:14:09,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:14:09,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:14:09,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:14:09,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:14:09,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:14:09,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117ab84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09, skipping insertion in model container [2022-11-02 20:14:09,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:14:09,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:14:09,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/sv-benchmarks/c/loops/eureka_05.i[810,823] [2022-11-02 20:14:10,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:14:10,023 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:14:10,038 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/sv-benchmarks/c/loops/eureka_05.i[810,823] [2022-11-02 20:14:10,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:14:10,064 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:14:10,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10 WrapperNode [2022-11-02 20:14:10,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:14:10,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:14:10,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:14:10,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:14:10,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,107 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-11-02 20:14:10,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:14:10,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:14:10,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:14:10,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:14:10,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:14:10,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:14:10,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:14:10,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:14:10,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (1/1) ... [2022-11-02 20:14:10,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:14:10,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:10,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:14:10,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:14:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:14:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:14:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:14:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:14:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:14:10,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:14:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:14:10,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:14:10,373 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:14:10,375 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:14:10,548 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:14:10,554 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:14:10,555 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:14:10,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:14:10 BoogieIcfgContainer [2022-11-02 20:14:10,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:14:10,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:14:10,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:14:10,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:14:10,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:14:09" (1/3) ... [2022-11-02 20:14:10,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4745111a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:14:10, skipping insertion in model container [2022-11-02 20:14:10,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:10" (2/3) ... [2022-11-02 20:14:10,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4745111a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:14:10, skipping insertion in model container [2022-11-02 20:14:10,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:14:10" (3/3) ... [2022-11-02 20:14:10,579 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2022-11-02 20:14:10,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:14:10,608 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:14:10,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:14:10,717 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;@21990d7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:14:10,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:14:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:14:10,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:10,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:10,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2022-11-02 20:14:10,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:10,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871846476] [2022-11-02 20:14:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:10,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871846476] [2022-11-02 20:14:11,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871846476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:11,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:11,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122702187] [2022-11-02 20:14:11,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:11,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:14:11,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:14:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:11,111 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:11,148 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-02 20:14:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:14:11,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-02 20:14:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:11,159 INFO L225 Difference]: With dead ends: 42 [2022-11-02 20:14:11,159 INFO L226 Difference]: Without dead ends: 20 [2022-11-02 20:14:11,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:11,166 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:11,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:14:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-02 20:14:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-02 20:14:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-02 20:14:11,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-11-02 20:14:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:11,201 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-02 20:14:11,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-02 20:14:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:14:11,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:11,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:11,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:14:11,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2022-11-02 20:14:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513170933] [2022-11-02 20:14:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513170933] [2022-11-02 20:14:11,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513170933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:11,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576491983] [2022-11-02 20:14:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:11,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:11,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:11,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:11,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:14:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:14:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576491983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:11,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:11,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-02 20:14:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260779444] [2022-11-02 20:14:11,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:11,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:14:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:14:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:14:11,587 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:11,683 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-02 20:14:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:14:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-02 20:14:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:11,691 INFO L225 Difference]: With dead ends: 45 [2022-11-02 20:14:11,692 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:14:11,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:14:11,696 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:11,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:14:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:14:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-02 20:14:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-02 20:14:11,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-11-02 20:14:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:11,718 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-02 20:14:11,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-02 20:14:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:14:11,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:11,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:11,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:11,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash -7962739, now seen corresponding path program 2 times [2022-11-02 20:14:11,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:11,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617593056] [2022-11-02 20:14:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:14:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617593056] [2022-11-02 20:14:12,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617593056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:12,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:12,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541895760] [2022-11-02 20:14:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:14:12,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:14:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:14:12,163 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2022-11-02 20:14:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:12,222 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-02 20:14:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:14:12,223 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 17 [2022-11-02 20:14:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:12,226 INFO L225 Difference]: With dead ends: 38 [2022-11-02 20:14:12,227 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:14:12,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:14:12,232 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:12,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:14:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:14:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-11-02 20:14:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2022-11-02 20:14:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-02 20:14:12,250 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-02 20:14:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:12,252 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-02 20:14:12,252 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) [2022-11-02 20:14:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-02 20:14:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:14:12,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:12,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:14:12,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 1 times [2022-11-02 20:14:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936788528] [2022-11-02 20:14:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:14:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:12,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936788528] [2022-11-02 20:14:12,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936788528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:12,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:12,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:14:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422616354] [2022-11-02 20:14:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:14:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:14:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:14:12,527 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:12,623 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-11-02 20:14:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:14:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 21 [2022-11-02 20:14:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:12,628 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:14:12,629 INFO L226 Difference]: Without dead ends: 34 [2022-11-02 20:14:12,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:14:12,630 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:12,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:14:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-02 20:14:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2022-11-02 20:14:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-02 20:14:12,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-11-02 20:14:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:12,639 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-02 20:14:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-02 20:14:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:14:12,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:12,640 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:14:12,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1025080129, now seen corresponding path program 1 times [2022-11-02 20:14:12,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639701404] [2022-11-02 20:14:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:14:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639701404] [2022-11-02 20:14:12,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639701404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118208637] [2022-11-02 20:14:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:12,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:12,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:14:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:14:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:14:13,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:14:13,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118208637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:13,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:13,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-02 20:14:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666575844] [2022-11-02 20:14:13,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:14:13,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:14:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:14:13,178 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:13,434 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-02 20:14:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:14:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:14:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:13,439 INFO L225 Difference]: With dead ends: 80 [2022-11-02 20:14:13,440 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:14:13,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:14:13,446 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:13,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 109 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:14:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:14:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2022-11-02 20:14:13,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-02 20:14:13,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2022-11-02 20:14:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:13,464 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-02 20:14:13,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-02 20:14:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:14:13,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:13,465 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:13,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:13,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:13,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2070168231, now seen corresponding path program 2 times [2022-11-02 20:14:13,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287863555] [2022-11-02 20:14:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:13,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:14:13,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:13,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287863555] [2022-11-02 20:14:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287863555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:13,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106998483] [2022-11-02 20:14:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:14:13,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:13,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:13,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:13,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:14:13,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:14:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:14:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:14:14,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:14:14,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106998483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:14,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:14,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-02 20:14:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791177149] [2022-11-02 20:14:14,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:14,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:14:14,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:14:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:14:14,269 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:14,679 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2022-11-02 20:14:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:14:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-02 20:14:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:14,681 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:14:14,681 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 20:14:14,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:14:14,683 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 170 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:14,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 76 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:14:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 20:14:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-11-02 20:14:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-11-02 20:14:14,697 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 30 [2022-11-02 20:14:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:14,698 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-11-02 20:14:14,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-11-02 20:14:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:14:14,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:14,700 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:14,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:14,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:14,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash 271285953, now seen corresponding path program 3 times [2022-11-02 20:14:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:14,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035336523] [2022-11-02 20:14:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:14:15,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:15,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035336523] [2022-11-02 20:14:15,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035336523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:15,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142953427] [2022-11-02 20:14:15,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:14:15,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:15,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:15,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:15,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:14:15,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:14:15,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:14:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 3 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-02 20:14:15,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 63 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-02 20:14:15,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142953427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:15,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:15,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-11-02 20:14:15,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245715956] [2022-11-02 20:14:15,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:15,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:14:15,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:15,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:14:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:14:15,490 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:15,858 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-11-02 20:14:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:14:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-02 20:14:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:15,860 INFO L225 Difference]: With dead ends: 79 [2022-11-02 20:14:15,860 INFO L226 Difference]: Without dead ends: 72 [2022-11-02 20:14:15,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:14:15,861 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:15,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:14:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-02 20:14:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-02 20:14:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-11-02 20:14:15,878 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2022-11-02 20:14:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:15,878 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-11-02 20:14:15,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-11-02 20:14:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:14:15,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:15,881 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:15,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:16,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:16,101 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:16,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1550484977, now seen corresponding path program 4 times [2022-11-02 20:14:16,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:16,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952623349] [2022-11-02 20:14:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:14:16,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:16,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952623349] [2022-11-02 20:14:16,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952623349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:16,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250693148] [2022-11-02 20:14:16,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:14:16,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:16,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:16,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:14:16,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:14:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:14:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:14:16,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:14:16,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250693148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:16,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:16,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 13 [2022-11-02 20:14:16,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814690683] [2022-11-02 20:14:16,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:16,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:14:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:14:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:14:16,931 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:17,573 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2022-11-02 20:14:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:14:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-02 20:14:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:17,575 INFO L225 Difference]: With dead ends: 137 [2022-11-02 20:14:17,576 INFO L226 Difference]: Without dead ends: 113 [2022-11-02 20:14:17,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:14:17,578 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:17,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 111 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:14:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-02 20:14:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-11-02 20:14:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 104 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-11-02 20:14:17,626 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 66 [2022-11-02 20:14:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:17,628 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-11-02 20:14:17,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-11-02 20:14:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:14:17,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:17,635 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:17,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:17,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:14:17,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash 96032675, now seen corresponding path program 5 times [2022-11-02 20:14:17,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:17,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936071758] [2022-11-02 20:14:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-02 20:14:19,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:19,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936071758] [2022-11-02 20:14:19,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936071758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:19,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290285917] [2022-11-02 20:14:19,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:14:19,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:19,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:19,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:14:19,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-02 20:14:19,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 20:14:19,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:19,448 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-02 20:14:19,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 22 treesize of output 31 [2022-11-02 20:14:19,946 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:19,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2022-11-02 20:14:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 162 proven. 39 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-02 20:14:20,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 164 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:14:22,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290285917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:22,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:22,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 22, 18] total 44 [2022-11-02 20:14:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500555872] [2022-11-02 20:14:22,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:14:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:14:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:14:22,544 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:39,593 INFO L93 Difference]: Finished difference Result 480 states and 638 transitions. [2022-11-02 20:14:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-02 20:14:39,594 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-02 20:14:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:39,596 INFO L225 Difference]: With dead ends: 480 [2022-11-02 20:14:39,597 INFO L226 Difference]: Without dead ends: 392 [2022-11-02 20:14:39,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7221 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=2283, Invalid=19179, Unknown=0, NotChecked=0, Total=21462 [2022-11-02 20:14:39,606 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 709 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:39,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 234 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 778 Invalid, 0 Unknown, 709 Unchecked, 0.9s Time] [2022-11-02 20:14:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-02 20:14:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 222. [2022-11-02 20:14:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.3438914027149322) internal successors, (297), 221 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 297 transitions. [2022-11-02 20:14:39,666 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 297 transitions. Word has length 69 [2022-11-02 20:14:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:39,666 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 297 transitions. [2022-11-02 20:14:39,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 297 transitions. [2022-11-02 20:14:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:14:39,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:39,668 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:39,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:39,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:39,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 962635175, now seen corresponding path program 1 times [2022-11-02 20:14:39,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:39,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397866088] [2022-11-02 20:14:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-02 20:14:40,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:40,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397866088] [2022-11-02 20:14:40,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397866088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:40,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870040400] [2022-11-02 20:14:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:40,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:40,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:40,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:14:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:14:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:40,842 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:14:40,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:14:41,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:14:41,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:14:41,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:14:41,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:14:41,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:14:41,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:14:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-11-02 20:14:41,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:41,683 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_313) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|) 0)) is different from false [2022-11-02 20:14:41,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:41,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-02 20:14:41,922 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:41,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-02 20:14:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 18 not checked. [2022-11-02 20:14:42,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870040400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:42,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:42,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-11-02 20:14:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088934476] [2022-11-02 20:14:42,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:42,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:14:42,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:42,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:14:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=715, Unknown=1, NotChecked=54, Total=870 [2022-11-02 20:14:42,227 INFO L87 Difference]: Start difference. First operand 222 states and 297 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:44,048 INFO L93 Difference]: Finished difference Result 452 states and 601 transitions. [2022-11-02 20:14:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:14:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-02 20:14:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:44,050 INFO L225 Difference]: With dead ends: 452 [2022-11-02 20:14:44,050 INFO L226 Difference]: Without dead ends: 250 [2022-11-02 20:14:44,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=517, Invalid=2566, Unknown=1, NotChecked=108, Total=3192 [2022-11-02 20:14:44,053 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 248 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 303 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 485 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-02 20:14:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-02 20:14:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2022-11-02 20:14:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.336322869955157) internal successors, (298), 223 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 298 transitions. [2022-11-02 20:14:44,105 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 298 transitions. Word has length 69 [2022-11-02 20:14:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:44,105 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 298 transitions. [2022-11-02 20:14:44,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 298 transitions. [2022-11-02 20:14:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:14:44,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:44,108 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:44,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:44,326 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash -454299909, now seen corresponding path program 1 times [2022-11-02 20:14:44,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:44,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821772492] [2022-11-02 20:14:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:44,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-02 20:14:45,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821772492] [2022-11-02 20:14:45,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821772492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42583321] [2022-11-02 20:14:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:45,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:45,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:45,341 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:45,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:14:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:14:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:45,503 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:14:45,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:14:45,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:14:45,729 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:14:45,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:14:45,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:46,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:46,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:46,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:46,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-11-02 20:14:46,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:46,519 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_376) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2022-11-02 20:14:46,698 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_370 Int) (v_ArrVal_376 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_370)) |c_~#array~0.base| v_ArrVal_376) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2022-11-02 20:14:46,721 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_56| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_56| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_370 Int) (v_ArrVal_376 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_56| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_370)) |c_~#array~0.base| v_ArrVal_376) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)))) is different from false [2022-11-02 20:14:46,754 INFO L356 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-02 20:14:46,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-02 20:14:46,764 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:46,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-02 20:14:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 221 trivial. 25 not checked. [2022-11-02 20:14:46,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42583321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:46,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:46,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-11-02 20:14:46,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225449614] [2022-11-02 20:14:46,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:46,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:14:46,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:14:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=727, Unknown=3, NotChecked=168, Total=992 [2022-11-02 20:14:46,969 INFO L87 Difference]: Start difference. First operand 224 states and 298 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:49,486 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_~#array~0.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4 .cse1)) (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (= (select |c_#valid| 3) 1) (= |c_~#array~0.base| 3) (forall ((|v_ULTIMATE.start_main_~i~1#1_56| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_56| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_370 Int) (v_ArrVal_376 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~1#1_56| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_370)) |c_~#array~0.base| v_ArrVal_376) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)))) (= |c_~#array~0.offset| 0) (= (select .cse2 (+ |c_~#array~0.offset| 12)) 0) (not (= 3 |c_ULTIMATE.start_main_~#array~1#1.base|)) (= 0 (select .cse2 |c_~#array~0.offset|)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= |c_ULTIMATE.start_main_~i~1#1| 1) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1)) |c_ULTIMATE.start_main_~i~1#1|))) is different from false [2022-11-02 20:14:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:50,766 INFO L93 Difference]: Finished difference Result 449 states and 596 transitions. [2022-11-02 20:14:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:14:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-02 20:14:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:50,769 INFO L225 Difference]: With dead ends: 449 [2022-11-02 20:14:50,769 INFO L226 Difference]: Without dead ends: 248 [2022-11-02 20:14:50,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=321, Invalid=2241, Unknown=4, NotChecked=404, Total=2970 [2022-11-02 20:14:50,771 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:50,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 353 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 534 Invalid, 0 Unknown, 168 Unchecked, 0.5s Time] [2022-11-02 20:14:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-02 20:14:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2022-11-02 20:14:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3259911894273129) internal successors, (301), 227 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 301 transitions. [2022-11-02 20:14:50,830 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 301 transitions. Word has length 73 [2022-11-02 20:14:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:50,831 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 301 transitions. [2022-11-02 20:14:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 301 transitions. [2022-11-02 20:14:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-02 20:14:50,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:50,832 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:50,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:51,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -88335469, now seen corresponding path program 2 times [2022-11-02 20:14:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805482353] [2022-11-02 20:14:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 108 proven. 99 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:14:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805482353] [2022-11-02 20:14:55,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805482353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938242516] [2022-11-02 20:14:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:14:55,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:55,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:55,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:14:55,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:14:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:55,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:14:55,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:55,650 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:14:55,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:14:55,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:14:55,899 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:14:55,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:14:55,973 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:14:55,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:14:56,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:56,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:56,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:56,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:56,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:14:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-11-02 20:14:56,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:56,862 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_441 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)) is different from false [2022-11-02 20:14:57,045 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_441 (Array Int Int)) (v_ArrVal_436 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_436)) |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)) is different from false [2022-11-02 20:14:57,059 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_71| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_71| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_441 (Array Int Int)) (v_ArrVal_436 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_71| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_436)) |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)))) is different from false [2022-11-02 20:14:57,072 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_433 Int) (v_ArrVal_441 (Array Int Int)) (|v_ULTIMATE.start_main_~i~1#1_71| Int) (v_ArrVal_436 Int)) (or (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_433) (+ (* |v_ULTIMATE.start_main_~i~1#1_71| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_436)) |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_71| 1) |c_ULTIMATE.start_main_~i~1#1|)))) is different from false [2022-11-02 20:14:57,095 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_72| Int)) (or (forall ((v_ArrVal_433 Int) (v_ArrVal_441 (Array Int Int)) (|v_ULTIMATE.start_main_~i~1#1_71| Int) (v_ArrVal_436 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_71| 1) |v_ULTIMATE.start_main_~i~1#1_72|)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_72| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_433) (+ (* |v_ULTIMATE.start_main_~i~1#1_71| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_436)) |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_72| 1) |c_ULTIMATE.start_main_~i~1#1|)))) is different from false [2022-11-02 20:14:57,137 INFO L356 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2022-11-02 20:14:57,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2022-11-02 20:14:57,146 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:57,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-11-02 20:14:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 221 trivial. 30 not checked. [2022-11-02 20:14:57,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938242516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:57,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:57,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 15] total 48 [2022-11-02 20:14:57,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100313985] [2022-11-02 20:14:57,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:57,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:14:57,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:57,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:14:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1751, Unknown=5, NotChecked=440, Total=2352 [2022-11-02 20:14:57,355 INFO L87 Difference]: Start difference. First operand 228 states and 301 transitions. Second operand has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:59,733 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_~#array~0.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4 .cse1)) (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (= (select |c_#valid| 3) 1) (= |c_~#array~0.base| 3) (= (+ |c_ULTIMATE.start_main_~i~1#1| 2) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8 .cse1))) (= |c_~#array~0.offset| 0) (= (select .cse2 (+ |c_~#array~0.offset| 4)) 0) (= (select .cse2 (+ |c_~#array~0.offset| 12)) 0) (forall ((|v_ULTIMATE.start_main_~i~1#1_72| Int)) (or (forall ((v_ArrVal_433 Int) (v_ArrVal_441 (Array Int Int)) (|v_ULTIMATE.start_main_~i~1#1_71| Int) (v_ArrVal_436 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_71| 1) |v_ULTIMATE.start_main_~i~1#1_72|)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~1#1_72| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_433) (+ (* |v_ULTIMATE.start_main_~i~1#1_71| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_436)) |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_72| 1) |c_ULTIMATE.start_main_~i~1#1|)))) (= |c_ULTIMATE.start_main_~i~1#1| 2) (not (= 3 |c_ULTIMATE.start_main_~#array~1#1.base|)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1)) |c_ULTIMATE.start_main_~i~1#1|))) is different from false [2022-11-02 20:15:19,909 WARN L234 SmtUtils]: Spent 20.13s on a formula simplification. DAG size of input: 52 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:15:21,913 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) (.cse2 (select |c_#memory_int| |c_~#array~0.base|))) (and (<= |c_ULTIMATE.start_main_~i~1#1| 1) (forall ((|v_ULTIMATE.start_main_~i~1#1_71| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_71| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_441 (Array Int Int)) (v_ArrVal_436 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~1#1_71| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_436)) |c_~#array~0.base| v_ArrVal_441) |c_ULTIMATE.start_main_~#array~1#1.base|) .cse1) 2)))) (= |c_~#array~0.base| 3) (= |c_~#array~0.offset| 0) (= 2 (select .cse0 .cse1)) (= (select .cse2 (+ |c_~#array~0.offset| 4)) 0) (= (select .cse2 (+ |c_~#array~0.offset| 12)) 0) (not (= 3 |c_ULTIMATE.start_main_~#array~1#1.base|)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)))) is different from false [2022-11-02 20:15:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:25,641 INFO L93 Difference]: Finished difference Result 460 states and 615 transitions. [2022-11-02 20:15:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:15:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-02 20:15:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:25,643 INFO L225 Difference]: With dead ends: 460 [2022-11-02 20:15:25,644 INFO L226 Difference]: Without dead ends: 319 [2022-11-02 20:15:25,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=478, Invalid=5549, Unknown=7, NotChecked=1106, Total=7140 [2022-11-02 20:15:25,647 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 180 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:25,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 640 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1425 Invalid, 0 Unknown, 385 Unchecked, 1.3s Time] [2022-11-02 20:15:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-02 20:15:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 262. [2022-11-02 20:15:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.318007662835249) internal successors, (344), 261 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 344 transitions. [2022-11-02 20:15:25,706 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 344 transitions. Word has length 77 [2022-11-02 20:15:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:25,707 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 344 transitions. [2022-11-02 20:15:25,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 344 transitions. [2022-11-02 20:15:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:15:25,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:25,709 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:25,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:25,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:15:25,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:25,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1295383961, now seen corresponding path program 3 times [2022-11-02 20:15:25,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:25,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531455645] [2022-11-02 20:15:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 121 proven. 30 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-02 20:15:27,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531455645] [2022-11-02 20:15:27,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531455645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161367287] [2022-11-02 20:15:27,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:15:27,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:27,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:27,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3546d974-65f4-45a0-a0cf-6e785bdc545c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:15:28,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-02 20:15:28,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:15:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:28,983 INFO L356 Elim1Store]: treesize reduction 148, result has 30.2 percent of original size [2022-11-02 20:15:28,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 80 [2022-11-02 20:15:30,380 INFO L356 Elim1Store]: treesize reduction 94, result has 52.5 percent of original size [2022-11-02 20:15:30,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 138 [2022-11-02 20:15:32,372 INFO L356 Elim1Store]: treesize reduction 4, result has 94.2 percent of original size [2022-11-02 20:15:32,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 100 [2022-11-02 20:15:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-02 20:15:32,887 INFO L328 TraceCheckSpWp]: Computing backward predicates...