./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8e703c0c99512c9025402351b79a41accf5bd6b8dfef03fa3544178837b891c9 --- 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 [2022-11-03 03:42:17,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:42:17,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:42:17,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:42:17,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:42:17,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:42:17,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:42:17,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:42:17,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:42:17,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:42:17,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:42:17,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:42:17,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:42:17,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:42:17,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:42:17,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:42:17,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:42:17,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:42:17,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:42:17,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:42:17,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:42:17,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:42:17,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:42:17,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:42:17,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:42:17,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:42:17,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:42:17,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:42:17,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:42:17,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:42:17,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:42:17,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:42:17,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:42:17,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:42:17,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:42:17,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:42:17,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:42:17,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:42:17,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:42:17,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:42:17,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:42:17,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:42:17,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:42:17,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:42:17,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:42:17,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:42:17,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:42:17,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:42:17,900 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:42:17,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:42:17,900 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:42:17,901 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:42:17,901 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:42:17,901 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:42:17,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:42:17,901 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:42:17,902 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:42:17,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:42:17,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:42:17,902 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:42:17,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:42:17,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:42:17,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:42:17,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:42:17,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:42:17,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:42:17,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:42:17,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:42:17,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:42:17,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:42:17,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:42:17,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:17,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:42:17,906 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:42:17,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:42:17,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:42:17,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:42:17,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:42:17,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:42:17,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:42:17,907 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e703c0c99512c9025402351b79a41accf5bd6b8dfef03fa3544178837b891c9 [2022-11-03 03:42:18,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:42:18,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:42:18,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:42:18,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:42:18,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:42:18,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c [2022-11-03 03:42:18,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/3e5a79a1f/b39f55b4eb5f404a8eff1aab65f9cb16/FLAGa368e4f7b [2022-11-03 03:42:18,833 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:42:18,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c [2022-11-03 03:42:18,843 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/3e5a79a1f/b39f55b4eb5f404a8eff1aab65f9cb16/FLAGa368e4f7b [2022-11-03 03:42:19,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/3e5a79a1f/b39f55b4eb5f404a8eff1aab65f9cb16 [2022-11-03 03:42:19,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:42:19,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:42:19,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:42:19,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:42:19,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:42:19,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67defd4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19, skipping insertion in model container [2022-11-03 03:42:19,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:42:19,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:42:19,417 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c[1014,1027] [2022-11-03 03:42:19,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:42:19,600 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:42:19,611 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c[1014,1027] [2022-11-03 03:42:19,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:42:19,680 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:42:19,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19 WrapperNode [2022-11-03 03:42:19,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:42:19,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:42:19,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:42:19,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:42:19,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,798 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 479 [2022-11-03 03:42:19,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:42:19,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:42:19,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:42:19,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:42:19,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:42:19,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:42:19,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:42:19,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:42:19,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (1/1) ... [2022-11-03 03:42:19,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:19,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:19,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:42:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:42:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:42:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:42:20,265 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:42:20,267 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:42:26,123 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:42:27,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:42:27,548 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:42:27,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:27 BoogieIcfgContainer [2022-11-03 03:42:27,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:42:27,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:42:27,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:42:27,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:42:27,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:42:19" (1/3) ... [2022-11-03 03:42:27,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c8abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:27, skipping insertion in model container [2022-11-03 03:42:27,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:19" (2/3) ... [2022-11-03 03:42:27,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c8abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:27, skipping insertion in model container [2022-11-03 03:42:27,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:27" (3/3) ... [2022-11-03 03:42:27,562 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.6.prop1-func-interl.c [2022-11-03 03:42:27,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:42:27,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:42:27,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:42:27,664 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=FINITE_AUTOMATA, 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;@6e29ce5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:42:27,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:42:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:42:27,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:27,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:42:27,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 4467594, now seen corresponding path program 1 times [2022-11-03 03:42:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:42:27,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873552309] [2022-11-03 03:42:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:27,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:42:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:42:28,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:42:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:42:28,475 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:42:28,477 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:42:28,478 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:42:28,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:42:28,485 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:42:28,489 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:42:28,524 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:42:28,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:42:28 BoogieIcfgContainer [2022-11-03 03:42:28,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:42:28,540 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:42:28,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:42:28,541 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:42:28,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:27" (3/4) ... [2022-11-03 03:42:28,545 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:42:28,545 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:42:28,548 INFO L158 Benchmark]: Toolchain (without parser) took 9409.41ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 78.6MB in the beginning and 273.3MB in the end (delta: -194.8MB). Peak memory consumption was 74.2MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,549 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory was 95.4MB in the beginning and 95.4MB in the end (delta: 74.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:42:28,550 INFO L158 Benchmark]: CACSL2BoogieTranslator took 541.46ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 81.6MB in the end (delta: -3.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,552 INFO L158 Benchmark]: Boogie Procedure Inliner took 116.50ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 68.8MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,559 INFO L158 Benchmark]: Boogie Preprocessor took 153.81ms. Allocated memory is still 117.4MB. Free memory was 68.8MB in the beginning and 61.7MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,560 INFO L158 Benchmark]: RCFGBuilder took 7597.15ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 61.7MB in the beginning and 340.4MB in the end (delta: -278.7MB). Peak memory consumption was 213.3MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,561 INFO L158 Benchmark]: TraceAbstraction took 984.62ms. Allocated memory is still 385.9MB. Free memory was 340.4MB in the beginning and 274.4MB in the end (delta: 66.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,563 INFO L158 Benchmark]: Witness Printer took 5.98ms. Allocated memory is still 385.9MB. Free memory was 274.4MB in the beginning and 273.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:42:28,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory was 95.4MB in the beginning and 95.4MB in the end (delta: 74.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 541.46ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 81.6MB in the end (delta: -3.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 116.50ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 68.8MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 153.81ms. Allocated memory is still 117.4MB. Free memory was 68.8MB in the beginning and 61.7MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 7597.15ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 61.7MB in the beginning and 340.4MB in the end (delta: -278.7MB). Peak memory consumption was 213.3MB. Max. memory is 16.1GB. * TraceAbstraction took 984.62ms. Allocated memory is still 385.9MB. Free memory was 340.4MB in the beginning and 274.4MB in the end (delta: 66.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 5.98ms. Allocated memory is still 385.9MB. Free memory was 274.4MB in the beginning and 273.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 104, overapproximation of shiftRight at line 108, overapproximation of bitwiseAnd at line 86, overapproximation of bitwiseComplement at line 106, overapproximation of bitwiseXOr at line 101. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 5); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (5 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_3 var_5 = 0; [L38] const SORT_1 var_12 = 0; [L39] const SORT_4 var_27 = 949; [L40] const SORT_3 var_28 = 1; [L41] const SORT_3 var_30 = 0; [L42] const SORT_4 var_32 = 16; [L43] const SORT_4 var_79 = 600; [L45] SORT_1 input_37; [L46] SORT_1 input_38; [L47] SORT_1 input_43; [L48] SORT_1 input_48; [L49] SORT_1 input_52; [L50] SORT_1 input_57; [L52] SORT_3 state_6 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L53] SORT_3 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L54] SORT_3 state_10 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L55] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L57] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L58] SORT_1 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L59] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L60] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L61] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L63] SORT_3 init_7_arg_1 = var_5; [L64] state_6 = init_7_arg_1 [L65] SORT_3 init_9_arg_1 = var_5; [L66] state_8 = init_9_arg_1 [L67] SORT_3 init_11_arg_1 = var_5; [L68] state_10 = init_11_arg_1 [L69] SORT_1 init_14_arg_1 = var_12; [L70] state_13 = init_14_arg_1 [L71] SORT_1 init_16_arg_1 = var_12; [L72] state_15 = init_16_arg_1 [L73] SORT_1 init_18_arg_1 = var_12; [L74] state_17 = init_18_arg_1 [L75] SORT_1 init_20_arg_1 = var_12; [L76] state_19 = init_20_arg_1 [L77] SORT_1 init_22_arg_1 = var_12; [L78] state_21 = init_22_arg_1 [L79] SORT_1 init_24_arg_1 = var_12; [L80] state_23 = init_24_arg_1 [L81] SORT_1 init_26_arg_1 = var_12; [L82] state_25 = init_26_arg_1 VAL [init_11_arg_1=0, init_14_arg_1=0, init_16_arg_1=0, init_18_arg_1=0, init_20_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=31, mask_SORT_3=65535, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=16, msb_SORT_3=32768, msb_SORT_4=2147483648, state_10=0, state_13=0, state_15=0, state_17=0, state_19=0, state_21=0, state_23=0, state_25=0, state_6=0, state_8=0, var_12=0, var_27=949, var_28=1, var_30=0, var_32=16, var_5=0, var_79=600] [L85] input_37 = __VERIFIER_nondet_uchar() [L86] input_37 = input_37 & mask_SORT_1 [L87] input_38 = __VERIFIER_nondet_uchar() [L88] input_38 = input_38 & mask_SORT_1 [L89] input_43 = __VERIFIER_nondet_uchar() [L90] input_43 = input_43 & mask_SORT_1 [L91] input_48 = __VERIFIER_nondet_uchar() [L92] input_48 = input_48 & mask_SORT_1 [L93] input_52 = __VERIFIER_nondet_uchar() [L94] input_52 = input_52 & mask_SORT_1 [L95] input_57 = __VERIFIER_nondet_uchar() [L96] input_57 = input_57 & mask_SORT_1 [L99] SORT_3 var_29_arg_0 = var_28; [L100] SORT_3 var_29_arg_1 = state_6; [L101] SORT_3 var_29 = var_29_arg_0 ^ var_29_arg_1; [L102] SORT_3 var_31_arg_0 = var_29; [L103] SORT_3 var_31_arg_1 = var_30; [L104] SORT_4 var_31 = ((SORT_4)var_31_arg_0 << 16) | var_31_arg_1; [L105] SORT_4 var_33_arg_0 = var_31; [L106] EXPR (var_33_arg_0 & msb_SORT_4) ? (var_33_arg_0 | ~mask_SORT_4) : (var_33_arg_0 & mask_SORT_4) [L106] var_33_arg_0 = (var_33_arg_0 & msb_SORT_4) ? (var_33_arg_0 | ~mask_SORT_4) : (var_33_arg_0 & mask_SORT_4) [L107] SORT_4 var_33_arg_1 = var_32; [L108] SORT_4 var_33 = (int)var_33_arg_0 >> var_33_arg_1; [L109] EXPR (var_33_arg_0 & msb_SORT_4) ? (var_33 | ~(mask_SORT_4 >> var_33_arg_1)) : var_33 [L109] var_33 = (var_33_arg_0 & msb_SORT_4) ? (var_33 | ~(mask_SORT_4 >> var_33_arg_1)) : var_33 [L110] var_33 = var_33 & mask_SORT_4 [L111] SORT_4 var_34_arg_0 = var_27; [L112] SORT_4 var_34_arg_1 = var_33; [L113] SORT_1 var_34 = var_34_arg_0 == var_34_arg_1; [L114] SORT_1 var_35_arg_0 = ~state_25; [L115] var_35_arg_0 = var_35_arg_0 & mask_SORT_1 [L116] SORT_1 var_35_arg_1 = var_34; [L117] SORT_1 var_35 = var_35_arg_0 & var_35_arg_1; [L118] var_35 = var_35 & mask_SORT_1 [L119] SORT_1 bad_36_arg_0 = var_35; [L120] CALL __VERIFIER_assert(!(bad_36_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:42:28,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8e703c0c99512c9025402351b79a41accf5bd6b8dfef03fa3544178837b891c9 --- 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 [2022-11-03 03:42:30,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:42:30,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:42:30,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:42:30,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:42:30,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:42:30,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:42:30,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:42:30,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:42:30,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:42:30,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:42:30,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:42:30,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:42:30,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:42:30,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:42:30,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:42:30,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:42:30,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:42:30,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:42:30,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:42:30,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:42:30,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:42:30,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:42:30,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:42:31,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:42:31,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:42:31,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:42:31,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:42:31,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:42:31,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:42:31,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:42:31,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:42:31,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:42:31,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:42:31,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:42:31,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:42:31,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:42:31,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:42:31,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:42:31,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:42:31,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:42:31,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:42:31,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:42:31,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:42:31,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:42:31,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:42:31,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:42:31,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:42:31,073 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:42:31,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:42:31,074 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:42:31,074 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:42:31,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:42:31,077 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:42:31,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:42:31,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:42:31,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:42:31,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:42:31,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:42:31,080 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:42:31,080 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:42:31,081 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:42:31,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:42:31,081 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:42:31,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:42:31,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:42:31,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:42:31,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:42:31,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:31,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:42:31,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:42:31,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:42:31,083 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:42:31,083 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:31,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:42:31,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:42:31,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:42:31,084 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e703c0c99512c9025402351b79a41accf5bd6b8dfef03fa3544178837b891c9 [2022-11-03 03:42:31,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:42:31,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:42:31,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:42:31,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:42:31,509 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:42:31,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c [2022-11-03 03:42:31,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/b9873cc1a/a1cd29c2e83a457eab80de35697dea74/FLAGdbe214440 [2022-11-03 03:42:32,197 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:42:32,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c [2022-11-03 03:42:32,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/b9873cc1a/a1cd29c2e83a457eab80de35697dea74/FLAGdbe214440 [2022-11-03 03:42:32,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/data/b9873cc1a/a1cd29c2e83a457eab80de35697dea74 [2022-11-03 03:42:32,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:42:32,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:42:32,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:42:32,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:42:32,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:42:32,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:32,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254ed394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32, skipping insertion in model container [2022-11-03 03:42:32,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:32,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:42:32,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:42:32,689 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c[1014,1027] [2022-11-03 03:42:32,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:42:32,849 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:42:32,887 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_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-func-interl.c[1014,1027] [2022-11-03 03:42:32,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:42:32,982 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:42:32,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32 WrapperNode [2022-11-03 03:42:32,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:42:32,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:42:32,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:42:32,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:42:32,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,041 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 479 [2022-11-03 03:42:33,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:42:33,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:42:33,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:42:33,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:42:33,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:42:33,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:42:33,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:42:33,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:42:33,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (1/1) ... [2022-11-03 03:42:33,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:33,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:42:33,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:42:33,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:42:33,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:42:33,362 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:42:33,364 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:42:34,071 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:42:34,079 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:42:34,079 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:42:34,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:34 BoogieIcfgContainer [2022-11-03 03:42:34,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:42:34,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:42:34,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:42:34,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:42:34,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:42:32" (1/3) ... [2022-11-03 03:42:34,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef7ed05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:34, skipping insertion in model container [2022-11-03 03:42:34,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:32" (2/3) ... [2022-11-03 03:42:34,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef7ed05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:34, skipping insertion in model container [2022-11-03 03:42:34,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:34" (3/3) ... [2022-11-03 03:42:34,091 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.6.prop1-func-interl.c [2022-11-03 03:42:34,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:42:34,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:42:34,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:42:34,170 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=FINITE_AUTOMATA, 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;@180c6f62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:42:34,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:42:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:42:34,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:34,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:34,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 03:42:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563064363] [2022-11-03 03:42:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:34,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:34,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:34,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:34,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:42:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:42:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:34,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:34,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563064363] [2022-11-03 03:42:34,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563064363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:34,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:42:34,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:42:34,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172087609] [2022-11-03 03:42:34,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:34,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:42:34,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:42:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:42:34,581 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-03 03:42:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:34,682 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-11-03 03:42:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:42:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-11-03 03:42:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:34,693 INFO L225 Difference]: With dead ends: 66 [2022-11-03 03:42:34,693 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 03:42:34,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:42:34,700 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:34,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-03 03:42:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 03:42:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-03 03:42:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-11-03 03:42:34,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 9 [2022-11-03 03:42:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:34,735 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-11-03 03:42:34,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-03 03:42:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-11-03 03:42:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:42:34,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:34,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:34,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:34,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 03:42:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883321925] [2022-11-03 03:42:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:34,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:34,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:34,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:42:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:35,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:42:35,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:35,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:35,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883321925] [2022-11-03 03:42:35,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883321925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:35,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:42:35,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:42:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048574397] [2022-11-03 03:42:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:35,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:42:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:42:35,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:42:35,212 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-03 03:42:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:35,294 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-11-03 03:42:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:42:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-11-03 03:42:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:35,295 INFO L225 Difference]: With dead ends: 64 [2022-11-03 03:42:35,295 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 03:42:35,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:42:35,297 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:35,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 150 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-03 03:42:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 03:42:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 03:42:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-11-03 03:42:35,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 9 [2022-11-03 03:42:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:35,305 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-11-03 03:42:35,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-03 03:42:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-11-03 03:42:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:42:35,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:35,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:35,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:35,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 03:42:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245916527] [2022-11-03 03:42:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:35,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:35,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:35,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:35,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:42:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:35,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:42:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:36,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:36,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245916527] [2022-11-03 03:42:36,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245916527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:36,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:42:36,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:42:36,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24408326] [2022-11-03 03:42:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:36,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:42:36,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:42:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:42:36,060 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2022-11-03 03:42:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:36,166 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-11-03 03:42:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:42:36,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 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 [2022-11-03 03:42:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:36,179 INFO L225 Difference]: With dead ends: 65 [2022-11-03 03:42:36,179 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:42:36,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:42:36,181 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:36,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 228 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-11-03 03:42:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:42:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-11-03 03:42:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-11-03 03:42:36,188 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 9 [2022-11-03 03:42:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:36,188 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-11-03 03:42:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2022-11-03 03:42:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-11-03 03:42:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:36,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:36,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:36,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:36,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash 649010465, now seen corresponding path program 1 times [2022-11-03 03:42:36,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406918236] [2022-11-03 03:42:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:36,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:36,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:36,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:42:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:36,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:42:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:36,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:36,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:36,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406918236] [2022-11-03 03:42:36,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406918236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:36,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:42:36,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:42:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563063054] [2022-11-03 03:42:36,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:36,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:42:36,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:42:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:42:36,797 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:36,881 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2022-11-03 03:42:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:42:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 03:42:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:36,882 INFO L225 Difference]: With dead ends: 72 [2022-11-03 03:42:36,883 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 03:42:36,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:42:36,884 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:36,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-03 03:42:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 03:42:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-03 03:42:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 03:42:36,889 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 36 [2022-11-03 03:42:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:36,890 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 03:42:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 03:42:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:36,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:36,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:36,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:37,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:37,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1156427869, now seen corresponding path program 1 times [2022-11-03 03:42:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:37,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741828457] [2022-11-03 03:42:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:37,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:37,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:37,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:37,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:42:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:42:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:37,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:37,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:37,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741828457] [2022-11-03 03:42:37,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741828457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:37,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:42:37,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:42:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984686330] [2022-11-03 03:42:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:42:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:42:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:42:37,540 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:37,618 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-11-03 03:42:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:42:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 03:42:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:37,620 INFO L225 Difference]: With dead ends: 74 [2022-11-03 03:42:37,620 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:42:37,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:42:37,621 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:37,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 03:42:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:42:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-03 03:42:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-03 03:42:37,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 36 [2022-11-03 03:42:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-03 03:42:37,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-03 03:42:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:37,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:37,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:37,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:37,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:37,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash -733726043, now seen corresponding path program 1 times [2022-11-03 03:42:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824499744] [2022-11-03 03:42:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:37,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:37,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:42:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:42:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:39,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:39,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:39,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824499744] [2022-11-03 03:42:39,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824499744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:39,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:42:39,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:42:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781487719] [2022-11-03 03:42:39,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:39,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:42:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:42:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-11-03 03:42:39,740 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:39,820 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2022-11-03 03:42:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:42:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 03:42:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:39,822 INFO L225 Difference]: With dead ends: 82 [2022-11-03 03:42:39,822 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 03:42:39,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2022-11-03 03:42:39,823 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:39,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 03:42:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 03:42:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-03 03:42:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-11-03 03:42:39,828 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 36 [2022-11-03 03:42:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:39,828 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-11-03 03:42:39,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-11-03 03:42:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:39,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:39,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:39,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 03:42:40,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:40,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1320532057, now seen corresponding path program 1 times [2022-11-03 03:42:40,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:40,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705434789] [2022-11-03 03:42:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:40,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:40,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:40,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:42:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:42:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:40,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:41,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705434789] [2022-11-03 03:42:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705434789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776258878] [2022-11-03 03:42:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:41,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:42:41,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:42:41,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 03:42:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:42:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:41,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776258878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377755523] [2022-11-03 03:42:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:42,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:42,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:42:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:42:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:42,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:42,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377755523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:42,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:42:42,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 03:42:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681629223] [2022-11-03 03:42:42,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:42,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:42:42,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:42,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:42:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:42:42,667 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:42,907 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-11-03 03:42:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:42:42,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:42:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:42,912 INFO L225 Difference]: With dead ends: 103 [2022-11-03 03:42:42,913 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 03:42:42,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:42:42,914 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:42,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 265 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 163 Unchecked, 0.1s Time] [2022-11-03 03:42:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 03:42:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 03:42:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-11-03 03:42:42,924 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 36 [2022-11-03 03:42:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-11-03 03:42:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-11-03 03:42:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:42,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:42,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:42,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:43,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:43,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:43,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:43,548 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1263273755, now seen corresponding path program 1 times [2022-11-03 03:42:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:43,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388426957] [2022-11-03 03:42:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:43,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:43,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:43,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:43,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:42:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:42:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:44,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:44,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388426957] [2022-11-03 03:42:44,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388426957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [935376028] [2022-11-03 03:42:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:44,652 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:44,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:42:44,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:42:44,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 03:42:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:42:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:45,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:45,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [935376028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910775832] [2022-11-03 03:42:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:45,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:45,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:45,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:42:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:42:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:42:46,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:42:46,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910775832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:42:46,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:42:46,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9, 9, 9] total 19 [2022-11-03 03:42:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541425575] [2022-11-03 03:42:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:42:46,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:42:46,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:42:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:42:46,066 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:46,090 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2022-11-03 03:42:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:42:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 36 [2022-11-03 03:42:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:46,093 INFO L225 Difference]: With dead ends: 139 [2022-11-03 03:42:46,093 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 03:42:46,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:42:46,094 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:46,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-11-03 03:42:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 03:42:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-03 03:42:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 107 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2022-11-03 03:42:46,103 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 36 [2022-11-03 03:42:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:46,104 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2022-11-03 03:42:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:42:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2022-11-03 03:42:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:46,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:46,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:46,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:46,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:46,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:46,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:46,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1263214173, now seen corresponding path program 1 times [2022-11-03 03:42:46,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:46,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880568745] [2022-11-03 03:42:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:46,722 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:46,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:42:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:42:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:47,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:50,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:50,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880568745] [2022-11-03 03:42:50,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880568745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:50,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753878168] [2022-11-03 03:42:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:50,314 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:50,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:42:50,316 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:42:50,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 03:42:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:42:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:44,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [753878168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133899842] [2022-11-03 03:43:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:44,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:44,543 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:43:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:43:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:45,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:13,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133899842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:13,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:44:13,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 03:44:13,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441567813] [2022-11-03 03:44:13,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:13,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:44:13,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:44:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1088, Unknown=33, NotChecked=0, Total=1332 [2022-11-03 03:44:13,940 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:15,069 INFO L93 Difference]: Finished difference Result 174 states and 237 transitions. [2022-11-03 03:44:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:44:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 36 [2022-11-03 03:44:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:15,071 INFO L225 Difference]: With dead ends: 174 [2022-11-03 03:44:15,071 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 03:44:15,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=401, Invalid=1728, Unknown=33, NotChecked=0, Total=2162 [2022-11-03 03:44:15,076 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:15,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 703 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-11-03 03:44:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 03:44:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-03 03:44:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.368421052631579) internal successors, (234), 171 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 234 transitions. [2022-11-03 03:44:15,102 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 234 transitions. Word has length 36 [2022-11-03 03:44:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:15,105 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 234 transitions. [2022-11-03 03:44:15,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 234 transitions. [2022-11-03 03:44:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:44:15,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:15,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:15,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:15,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:15,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:15,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:15,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -583155803, now seen corresponding path program 1 times [2022-11-03 03:44:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:15,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613851305] [2022-11-03 03:44:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:15,734 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:15,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:44:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:44:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:16,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:23,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613851305] [2022-11-03 03:44:23,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613851305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:23,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754277406] [2022-11-03 03:44:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:23,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:23,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:23,028 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:23,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:44:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:44:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:23,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754277406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151877965] [2022-11-03 03:45:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:23,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:23,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:45:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:45:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:24,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151877965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:36,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:45:36,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:45:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671649826] [2022-11-03 03:45:36,336 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:45:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:45:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:45:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:45:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=910, Unknown=33, NotChecked=0, Total=1122 [2022-11-03 03:45:36,338 INFO L87 Difference]: Start difference. First operand 172 states and 234 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:37,244 INFO L93 Difference]: Finished difference Result 310 states and 426 transitions. [2022-11-03 03:45:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:45:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 36 [2022-11-03 03:45:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:37,246 INFO L225 Difference]: With dead ends: 310 [2022-11-03 03:45:37,246 INFO L226 Difference]: Without dead ends: 308 [2022-11-03 03:45:37,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 78.0s TimeCoverageRelationStatistics Valid=360, Invalid=1499, Unknown=33, NotChecked=0, Total=1892 [2022-11-03 03:45:37,248 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:37,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 681 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 03:45:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-03 03:45:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-11-03 03:45:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3778501628664495) internal successors, (423), 307 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 423 transitions. [2022-11-03 03:45:37,269 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 423 transitions. Word has length 36 [2022-11-03 03:45:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:37,269 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 423 transitions. [2022-11-03 03:45:37,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 423 transitions. [2022-11-03 03:45:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:45:37,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:37,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:37,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:37,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:37,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:45:37,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash -562149595, now seen corresponding path program 1 times [2022-11-03 03:45:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:45:37,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157772942] [2022-11-03 03:45:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:37,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:45:37,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:45:37,886 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:45:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:45:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:45:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:38,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:44,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:45:44,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157772942] [2022-11-03 03:45:44,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157772942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:44,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002117965] [2022-11-03 03:45:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:44,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:45:44,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:45:44,782 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:45:44,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:45:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:45:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:45,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:46,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2002117965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739605431] [2022-11-03 03:46:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:46,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:46,435 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:46,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:46:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:46:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:47,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:11,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739605431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:11,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:47:11,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 03:47:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139239361] [2022-11-03 03:47:11,597 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:47:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:47:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:47:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1086, Unknown=35, NotChecked=0, Total=1332 [2022-11-03 03:47:11,599 INFO L87 Difference]: Start difference. First operand 308 states and 423 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:12,764 INFO L93 Difference]: Finished difference Result 374 states and 515 transitions. [2022-11-03 03:47:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:47:12,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 36 [2022-11-03 03:47:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:12,767 INFO L225 Difference]: With dead ends: 374 [2022-11-03 03:47:12,767 INFO L226 Difference]: Without dead ends: 372 [2022-11-03 03:47:12,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 91.5s TimeCoverageRelationStatistics Valid=401, Invalid=1726, Unknown=35, NotChecked=0, Total=2162 [2022-11-03 03:47:12,769 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:12,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 712 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2022-11-03 03:47:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-03 03:47:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-11-03 03:47:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.3800539083557952) internal successors, (512), 371 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 512 transitions. [2022-11-03 03:47:12,792 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 512 transitions. Word has length 36 [2022-11-03 03:47:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:12,792 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 512 transitions. [2022-11-03 03:47:12,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 512 transitions. [2022-11-03 03:47:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:47:12,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:12,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:12,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:13,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:13,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:13,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:13,399 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 117908775, now seen corresponding path program 1 times [2022-11-03 03:47:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258997350] [2022-11-03 03:47:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:13,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:13,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:13,401 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:13,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:47:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:47:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:14,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:18,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258997350] [2022-11-03 03:47:18,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258997350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712633021] [2022-11-03 03:47:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:18,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:18,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:18,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 03:47:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:47:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:19,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1712633021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684714470] [2022-11-03 03:48:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:15,569 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:15,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 03:48:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:48:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:22,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684714470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:22,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:48:22,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:48:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012814394] [2022-11-03 03:48:22,805 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:48:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:48:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:48:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=914, Unknown=26, NotChecked=0, Total=1122 [2022-11-03 03:48:22,807 INFO L87 Difference]: Start difference. First operand 372 states and 512 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:23,683 INFO L93 Difference]: Finished difference Result 642 states and 886 transitions. [2022-11-03 03:48:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:48:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 36 [2022-11-03 03:48:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:23,687 INFO L225 Difference]: With dead ends: 642 [2022-11-03 03:48:23,687 INFO L226 Difference]: Without dead ends: 640 [2022-11-03 03:48:23,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=367, Invalid=1499, Unknown=26, NotChecked=0, Total=1892 [2022-11-03 03:48:23,689 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 281 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:23,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 700 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 03:48:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-03 03:48:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-11-03 03:48:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.381846635367762) internal successors, (883), 639 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 883 transitions. [2022-11-03 03:48:23,731 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 883 transitions. Word has length 36 [2022-11-03 03:48:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:23,731 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 883 transitions. [2022-11-03 03:48:23,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 883 transitions. [2022-11-03 03:48:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:48:23,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:23,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:23,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 03:48:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:24,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:24,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:24,349 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2022867751, now seen corresponding path program 1 times [2022-11-03 03:48:24,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:24,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356195246] [2022-11-03 03:48:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:24,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:24,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:48:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:48:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:25,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:26,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356195246] [2022-11-03 03:48:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356195246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211499144] [2022-11-03 03:48:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:26,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:26,849 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:48:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:48:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:27,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:20,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211499144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:20,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660959618] [2022-11-03 03:49:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:20,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:20,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:20,068 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:20,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 03:49:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:49:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:21,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660959618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:26,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:49:26,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:49:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546048396] [2022-11-03 03:49:26,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:49:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:49:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=917, Unknown=25, NotChecked=0, Total=1122 [2022-11-03 03:49:26,760 INFO L87 Difference]: Start difference. First operand 640 states and 883 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:27,624 INFO L93 Difference]: Finished difference Result 778 states and 1075 transitions. [2022-11-03 03:49:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:49:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 36 [2022-11-03 03:49:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:27,634 INFO L225 Difference]: With dead ends: 778 [2022-11-03 03:49:27,635 INFO L226 Difference]: Without dead ends: 776 [2022-11-03 03:49:27,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 59.9s TimeCoverageRelationStatistics Valid=365, Invalid=1502, Unknown=25, NotChecked=0, Total=1892 [2022-11-03 03:49:27,636 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 284 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:27,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 719 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-11-03 03:49:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-03 03:49:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-11-03 03:49:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.383225806451613) internal successors, (1072), 775 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1072 transitions. [2022-11-03 03:49:27,685 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1072 transitions. Word has length 36 [2022-11-03 03:49:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:27,686 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1072 transitions. [2022-11-03 03:49:27,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1072 transitions. [2022-11-03 03:49:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:49:27,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:27,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:27,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:27,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:28,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:28,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:28,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2043873959, now seen corresponding path program 1 times [2022-11-03 03:49:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:28,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749919055] [2022-11-03 03:49:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:28,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:28,305 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:28,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:49:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:49:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:29,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:34,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749919055] [2022-11-03 03:49:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749919055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651878544] [2022-11-03 03:49:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:34,552 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:34,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:34,554 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:34,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 03:49:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:49:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:35,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:33,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651878544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:33,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795614777] [2022-11-03 03:50:33,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:33,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:33,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:33,737 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 03:50:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:33,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:50:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:34,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795614777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:55,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:50:55,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 03:50:55,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979027898] [2022-11-03 03:50:55,700 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:50:55,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:50:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1088, Unknown=34, NotChecked=0, Total=1332 [2022-11-03 03:50:55,702 INFO L87 Difference]: Start difference. First operand 776 states and 1072 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:56,905 INFO L93 Difference]: Finished difference Result 842 states and 1164 transitions. [2022-11-03 03:50:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:50:56,906 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 36 [2022-11-03 03:50:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:56,909 INFO L225 Difference]: With dead ends: 842 [2022-11-03 03:50:56,909 INFO L226 Difference]: Without dead ends: 840 [2022-11-03 03:50:56,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=404, Invalid=1724, Unknown=34, NotChecked=0, Total=2162 [2022-11-03 03:50:56,911 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 164 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:56,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 724 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-03 03:50:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-03 03:50:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 840. [2022-11-03 03:50:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.3837902264600714) internal successors, (1161), 839 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1161 transitions. [2022-11-03 03:50:56,969 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1161 transitions. Word has length 36 [2022-11-03 03:50:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:56,970 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1161 transitions. [2022-11-03 03:50:56,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1161 transitions. [2022-11-03 03:50:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:50:56,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:56,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:56,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:57,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:57,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 03:50:57,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:57,575 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1571034967, now seen corresponding path program 1 times [2022-11-03 03:50:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:57,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544923924] [2022-11-03 03:50:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:57,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:57,577 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:57,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:50:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:57,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:50:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:58,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:03,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544923924] [2022-11-03 03:51:03,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544923924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1621763157] [2022-11-03 03:51:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:03,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:03,849 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 03:51:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:51:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:04,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:01,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1621763157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:01,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080868215] [2022-11-03 03:52:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:01,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:01,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:01,596 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:01,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 03:52:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:01,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:52:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:02,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:13,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080868215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:13,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:13,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:52:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928026078] [2022-11-03 03:52:13,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:52:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:52:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=913, Unknown=30, NotChecked=0, Total=1122 [2022-11-03 03:52:13,528 INFO L87 Difference]: Start difference. First operand 840 states and 1161 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:14,519 INFO L93 Difference]: Finished difference Result 1358 states and 1880 transitions. [2022-11-03 03:52:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:52:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 36 [2022-11-03 03:52:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:14,524 INFO L225 Difference]: With dead ends: 1358 [2022-11-03 03:52:14,525 INFO L226 Difference]: Without dead ends: 1356 [2022-11-03 03:52:14,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=364, Invalid=1498, Unknown=30, NotChecked=0, Total=1892 [2022-11-03 03:52:14,528 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 242 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:14,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 817 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-11-03 03:52:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-11-03 03:52:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1356. [2022-11-03 03:52:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.3852398523985239) internal successors, (1877), 1355 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1877 transitions. [2022-11-03 03:52:14,656 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1877 transitions. Word has length 36 [2022-11-03 03:52:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:14,657 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1877 transitions. [2022-11-03 03:52:14,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1877 transitions. [2022-11-03 03:52:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:52:14,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:14,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:14,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:14,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:15,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:15,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1135584427, now seen corresponding path program 1 times [2022-11-03 03:52:15,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418482831] [2022-11-03 03:52:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:15,287 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:52:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:15,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:52:15,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:16,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:21,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418482831] [2022-11-03 03:52:21,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418482831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:21,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255332990] [2022-11-03 03:52:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:21,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:21,079 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:21,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 03:52:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:52:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:22,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1255332990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981222403] [2022-11-03 03:53:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:24,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:24,556 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:24,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 03:53:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:24,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:53:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:06,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981222403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:06,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:06,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:54:06,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783187896] [2022-11-03 03:54:06,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:06,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:54:06,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:54:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=904, Unknown=41, NotChecked=0, Total=1122 [2022-11-03 03:54:06,075 INFO L87 Difference]: Start difference. First operand 1356 states and 1877 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:07,018 INFO L93 Difference]: Finished difference Result 1418 states and 1963 transitions. [2022-11-03 03:54:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:54:07,019 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 36 [2022-11-03 03:54:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:07,024 INFO L225 Difference]: With dead ends: 1418 [2022-11-03 03:54:07,024 INFO L226 Difference]: Without dead ends: 1416 [2022-11-03 03:54:07,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 107.9s TimeCoverageRelationStatistics Valid=314, Invalid=1367, Unknown=41, NotChecked=0, Total=1722 [2022-11-03 03:54:07,026 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 255 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:07,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 872 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 03:54:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-11-03 03:54:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 720. [2022-11-03 03:54:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.383866481223922) internal successors, (995), 719 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 995 transitions. [2022-11-03 03:54:07,103 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 995 transitions. Word has length 36 [2022-11-03 03:54:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:07,103 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 995 transitions. [2022-11-03 03:54:07,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 995 transitions. [2022-11-03 03:54:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:54:07,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:07,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:07,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:07,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:07,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:07,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:54:07,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1179983447, now seen corresponding path program 1 times [2022-11-03 03:54:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:07,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943690349] [2022-11-03 03:54:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:07,711 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:07,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:54:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:54:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:08,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:08,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943690349] [2022-11-03 03:54:08,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943690349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655071970] [2022-11-03 03:54:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:08,856 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:08,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:54:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:54:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:09,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655071970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760472959] [2022-11-03 03:54:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:09,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:09,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:09,661 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:09,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 03:54:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:54:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:10,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:10,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760472959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:10,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:10,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2022-11-03 03:54:10,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722361756] [2022-11-03 03:54:10,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:10,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:54:10,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:54:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:54:10,273 INFO L87 Difference]: Start difference. First operand 720 states and 995 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:10,931 INFO L93 Difference]: Finished difference Result 939 states and 1268 transitions. [2022-11-03 03:54:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:54:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:54:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:10,935 INFO L225 Difference]: With dead ends: 939 [2022-11-03 03:54:10,935 INFO L226 Difference]: Without dead ends: 910 [2022-11-03 03:54:10,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:54:10,936 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 214 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:10,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 703 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 322 Unchecked, 0.4s Time] [2022-11-03 03:54:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-11-03 03:54:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 738. [2022-11-03 03:54:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 1.3826322930800543) internal successors, (1019), 737 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1019 transitions. [2022-11-03 03:54:11,004 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1019 transitions. Word has length 36 [2022-11-03 03:54:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:11,004 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1019 transitions. [2022-11-03 03:54:11,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1019 transitions. [2022-11-03 03:54:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:54:11,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:11,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:11,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:11,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:11,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:11,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:11,608 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1122665563, now seen corresponding path program 1 times [2022-11-03 03:54:11,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:11,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974871212] [2022-11-03 03:54:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:11,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:11,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:11,609 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:11,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:54:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:11,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:54:11,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:12,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:16,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:16,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974871212] [2022-11-03 03:54:16,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974871212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:16,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [600961298] [2022-11-03 03:54:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:16,976 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:16,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:16,978 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:16,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 03:54:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:54:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:17,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:09,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [600961298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:09,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068218083] [2022-11-03 03:55:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:09,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:09,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:09,576 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:09,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 03:55:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:55:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:10,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:58,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068218083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:58,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:55:58,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:55:58,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118696985] [2022-11-03 03:55:58,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:55:58,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:55:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:55:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=900, Unknown=45, NotChecked=0, Total=1122 [2022-11-03 03:55:58,018 INFO L87 Difference]: Start difference. First operand 738 states and 1019 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:58,855 INFO L93 Difference]: Finished difference Result 816 states and 1128 transitions. [2022-11-03 03:55:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:55:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 36 [2022-11-03 03:55:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:58,859 INFO L225 Difference]: With dead ends: 816 [2022-11-03 03:55:58,859 INFO L226 Difference]: Without dead ends: 814 [2022-11-03 03:55:58,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 103.8s TimeCoverageRelationStatistics Valid=314, Invalid=1363, Unknown=45, NotChecked=0, Total=1722 [2022-11-03 03:55:58,861 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:58,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 812 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 03:55:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-03 03:55:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 726. [2022-11-03 03:55:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.3820689655172413) internal successors, (1002), 725 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1002 transitions. [2022-11-03 03:55:58,921 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1002 transitions. Word has length 36 [2022-11-03 03:55:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:58,921 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1002 transitions. [2022-11-03 03:55:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1002 transitions. [2022-11-03 03:55:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:55:58,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:58,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:55:58,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:59,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:59,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:59,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash -442607193, now seen corresponding path program 1 times [2022-11-03 03:55:59,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:59,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282298685] [2022-11-03 03:55:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:59,542 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:59,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:55:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:55:59,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:00,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:06,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282298685] [2022-11-03 03:56:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282298685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [963458142] [2022-11-03 03:56:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:06,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:06,187 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 03:56:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:56:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:07,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:05,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [963458142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:05,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781014364] [2022-11-03 03:57:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:05,064 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:05,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 03:57:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:57:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:06,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781014364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:27,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:27,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 03:57:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821178034] [2022-11-03 03:57:27,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:57:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:57:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1085, Unknown=36, NotChecked=0, Total=1332 [2022-11-03 03:57:27,290 INFO L87 Difference]: Start difference. First operand 726 states and 1002 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:28,839 INFO L93 Difference]: Finished difference Result 864 states and 1194 transitions. [2022-11-03 03:57:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:57:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 36 [2022-11-03 03:57:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:28,841 INFO L225 Difference]: With dead ends: 864 [2022-11-03 03:57:28,841 INFO L226 Difference]: Without dead ends: 862 [2022-11-03 03:57:28,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 85.5s TimeCoverageRelationStatistics Valid=401, Invalid=1725, Unknown=36, NotChecked=0, Total=2162 [2022-11-03 03:57:28,842 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 171 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:28,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 731 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 03:57:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-03 03:57:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-03 03:57:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3832752613240418) internal successors, (1191), 861 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1191 transitions. [2022-11-03 03:57:28,931 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1191 transitions. Word has length 36 [2022-11-03 03:57:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:28,932 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1191 transitions. [2022-11-03 03:57:28,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1191 transitions. [2022-11-03 03:57:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:57:28,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:28,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:28,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:29,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:29,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:29,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:29,548 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash -421600985, now seen corresponding path program 1 times [2022-11-03 03:57:29,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:29,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88235883] [2022-11-03 03:57:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:29,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:29,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:29,551 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:29,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64827f78-dfdc-4142-8b39-dfdc8a3e3ace/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 03:57:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:57:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:30,562 INFO L328 TraceCheckSpWp]: Computing backward predicates...