./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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 f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab --- 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 04:10:47,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:10:47,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:10:47,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:10:47,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:10:47,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:10:47,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:10:47,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:10:47,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:10:47,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:10:47,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:10:47,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:10:47,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:10:47,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:10:47,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:10:47,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:10:47,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:10:47,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:10:47,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:10:47,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:10:47,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:10:47,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:10:47,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:10:47,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:10:47,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:10:47,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:10:47,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:10:47,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:10:47,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:10:47,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:10:47,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:10:47,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:10:47,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:10:47,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:10:47,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:10:47,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:10:47,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:10:47,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:10:47,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:10:47,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:10:47,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:10:47,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:10:47,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:10:47,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:10:47,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:10:47,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:10:47,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:10:47,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:10:47,931 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:10:47,932 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:10:47,932 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:10:47,932 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:10:47,933 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:10:47,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:10:47,933 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:10:47,933 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:10:47,934 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:10:47,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:10:47,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:10:47,935 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:10:47,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:10:47,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:10:47,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:10:47,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:10:47,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:10:47,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:10:47,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:10:47,937 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:10:47,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:10:47,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:10:47,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:10:47,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:47,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:10:47,938 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:10:47,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:10:47,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:10:47,939 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:10:47,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:10:47,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:10:47,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:10:47,940 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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab [2022-11-03 04:10:48,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:10:48,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:10:48,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:10:48,282 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:10:48,282 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:10:48,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-03 04:10:48,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/a38d90939/ef8982037ea6463184c8ae1760a7540b/FLAGa9b4b4438 [2022-11-03 04:10:48,886 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:10:48,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-03 04:10:48,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/a38d90939/ef8982037ea6463184c8ae1760a7540b/FLAGa9b4b4438 [2022-11-03 04:10:49,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/a38d90939/ef8982037ea6463184c8ae1760a7540b [2022-11-03 04:10:49,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:10:49,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:10:49,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:49,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:10:49,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:10:49,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7b1635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49, skipping insertion in model container [2022-11-03 04:10:49,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:10:49,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:10:49,494 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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-03 04:10:49,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:49,602 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:10:49,614 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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-03 04:10:49,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:49,712 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:10:49,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49 WrapperNode [2022-11-03 04:10:49,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:49,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:49,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:10:49,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:10:49,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,795 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 571 [2022-11-03 04:10:49,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:49,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:10:49,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:10:49,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:10:49,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:10:49,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:10:49,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:10:49,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:10:49,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (1/1) ... [2022-11-03 04:10:49,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:49,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:10:49,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:10:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:10:49,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:10:50,177 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:10:50,179 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:10:50,888 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:10:51,966 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:10:51,966 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:10:51,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:51 BoogieIcfgContainer [2022-11-03 04:10:51,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:10:51,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:10:51,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:10:51,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:10:51,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:49" (1/3) ... [2022-11-03 04:10:51,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b167611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:51, skipping insertion in model container [2022-11-03 04:10:51,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:49" (2/3) ... [2022-11-03 04:10:51,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b167611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:51, skipping insertion in model container [2022-11-03 04:10:51,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:51" (3/3) ... [2022-11-03 04:10:51,981 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-03 04:10:52,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:10:52,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:10:52,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:10:52,064 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;@15839a8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:10:52,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:10:52,072 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 04:10:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:10:52,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:52,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:10:52,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash 9751685, now seen corresponding path program 1 times [2022-11-03 04:10:52,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:52,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524817603] [2022-11-03 04:10:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:52,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:10:52,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:10:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:10:52,516 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:10:52,518 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:10:52,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:10:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:10:52,527 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:10:52,531 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:10:52,565 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:10:52,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:10:52 BoogieIcfgContainer [2022-11-03 04:10:52,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:10:52,574 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:10:52,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:10:52,574 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:10:52,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:51" (3/4) ... [2022-11-03 04:10:52,579 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:10:52,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:10:52,581 INFO L158 Benchmark]: Toolchain (without parser) took 3367.31ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 71.2MB in the beginning and 81.4MB in the end (delta: -10.2MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2022-11-03 04:10:52,581 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory was 88.0MB in the beginning and 88.0MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:10:52,582 INFO L158 Benchmark]: CACSL2BoogieTranslator took 498.22ms. Allocated memory is still 109.1MB. Free memory was 71.0MB in the beginning and 77.9MB in the end (delta: -6.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 04:10:52,582 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.97ms. Allocated memory is still 109.1MB. Free memory was 77.9MB in the beginning and 72.0MB in the end (delta: 6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 04:10:52,583 INFO L158 Benchmark]: Boogie Preprocessor took 56.58ms. Allocated memory is still 109.1MB. Free memory was 72.0MB in the beginning and 68.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:10:52,584 INFO L158 Benchmark]: RCFGBuilder took 2115.65ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 68.1MB in the beginning and 113.9MB in the end (delta: -45.8MB). Peak memory consumption was 63.9MB. Max. memory is 16.1GB. [2022-11-03 04:10:52,584 INFO L158 Benchmark]: TraceAbstraction took 600.97ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 81.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-11-03 04:10:52,585 INFO L158 Benchmark]: Witness Printer took 5.48ms. Allocated memory is still 151.0MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:10:52,588 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory was 88.0MB in the beginning and 88.0MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 498.22ms. Allocated memory is still 109.1MB. Free memory was 71.0MB in the beginning and 77.9MB in the end (delta: -6.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.97ms. Allocated memory is still 109.1MB. Free memory was 77.9MB in the beginning and 72.0MB in the end (delta: 6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.58ms. Allocated memory is still 109.1MB. Free memory was 72.0MB in the beginning and 68.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2115.65ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 68.1MB in the beginning and 113.9MB in the end (delta: -45.8MB). Peak memory consumption was 63.9MB. Max. memory is 16.1GB. * TraceAbstraction took 600.97ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 81.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 5.48ms. Allocated memory is still 151.0MB. Free memory is still 81.4MB. There was no memory consumed. 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 bitwiseComplement at line 164, overapproximation of bitwiseOr at line 162, overapproximation of bitwiseAnd at line 149. 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_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_31 mask_SORT_31 = (SORT_31)-1 >> (sizeof(SORT_31) * 8 - 4); [L35] const SORT_31 msb_SORT_31 = (SORT_31)1 << (4 - 1); [L37] const SORT_67 mask_SORT_67 = (SORT_67)-1 >> (sizeof(SORT_67) * 8 - 10); [L38] const SORT_67 msb_SORT_67 = (SORT_67)1 << (10 - 1); [L40] const SORT_1 var_7 = 0; [L41] const SORT_10 var_12 = 0; [L42] const SORT_1 var_21 = 1; [L43] const SORT_67 var_68 = 0; [L44] const SORT_10 var_119 = 104; [L45] const SORT_10 var_136 = 1; [L47] SORT_1 input_2; [L48] SORT_3 input_4; [L49] SORT_1 input_5; [L50] SORT_1 input_6; [L51] SORT_1 input_29; [L52] SORT_31 input_32; [L53] SORT_31 input_34; [L54] SORT_1 input_36; [L55] SORT_1 input_38; [L56] SORT_1 input_44; [L57] SORT_1 input_46; [L58] SORT_1 input_48; [L59] SORT_3 input_52; [L60] SORT_1 input_55; [L61] SORT_1 input_63; [L62] SORT_1 input_73; [L63] SORT_1 input_79; [L64] SORT_1 input_81; [L65] SORT_1 input_95; [L66] SORT_1 input_101; [L67] SORT_1 input_107; [L68] SORT_1 input_113; [L69] SORT_1 input_114; [L70] SORT_1 input_115; [L71] SORT_67 input_134; [L72] SORT_1 input_143; [L73] SORT_1 input_144; [L74] SORT_1 input_145; [L76] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_50 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_67 state_69 = __VERIFIER_nondet_ushort() & mask_SORT_67; [L88] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 init_9_arg_1 = var_7; [L91] state_8 = init_9_arg_1 [L92] SORT_1 init_15_arg_1 = var_7; [L93] state_14 = init_15_arg_1 [L94] SORT_1 init_26_arg_1 = var_7; [L95] state_25 = init_26_arg_1 [L96] SORT_1 init_28_arg_1 = var_7; [L97] state_27 = init_28_arg_1 [L98] SORT_1 init_41_arg_1 = var_7; [L99] state_40 = init_41_arg_1 [L100] SORT_1 init_43_arg_1 = var_7; [L101] state_42 = init_43_arg_1 [L102] SORT_1 init_51_arg_1 = var_21; [L103] state_50 = init_51_arg_1 [L104] SORT_1 init_58_arg_1 = var_7; [L105] state_57 = init_58_arg_1 [L106] SORT_1 init_60_arg_1 = var_7; [L107] state_59 = init_60_arg_1 [L108] SORT_1 init_62_arg_1 = var_7; [L109] state_61 = init_62_arg_1 [L110] SORT_1 init_66_arg_1 = var_7; [L111] state_65 = init_66_arg_1 [L112] SORT_67 init_70_arg_1 = var_68; [L113] state_69 = init_70_arg_1 [L114] SORT_1 init_72_arg_1 = var_7; [L115] state_71 = init_72_arg_1 VAL [init_15_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_51_arg_1=1, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_66_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_31=15, mask_SORT_67=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_31=8, msb_SORT_67=512, state_14=0, state_25=0, state_27=0, state_40=0, state_42=0, state_50=1, state_57=0, state_59=0, state_61=0, state_65=0, state_69=0, state_71=0, state_8=0, var_119=104, var_12=0, var_136=1, var_21=1, var_68=0, var_7=0] [L118] input_2 = __VERIFIER_nondet_uchar() [L119] input_4 = __VERIFIER_nondet_uchar() [L120] input_5 = __VERIFIER_nondet_uchar() [L121] input_6 = __VERIFIER_nondet_uchar() [L122] input_29 = __VERIFIER_nondet_uchar() [L123] input_32 = __VERIFIER_nondet_uchar() [L124] input_34 = __VERIFIER_nondet_uchar() [L125] input_36 = __VERIFIER_nondet_uchar() [L126] input_38 = __VERIFIER_nondet_uchar() [L127] input_44 = __VERIFIER_nondet_uchar() [L128] input_46 = __VERIFIER_nondet_uchar() [L129] input_48 = __VERIFIER_nondet_uchar() [L130] input_52 = __VERIFIER_nondet_uchar() [L131] input_55 = __VERIFIER_nondet_uchar() [L132] input_63 = __VERIFIER_nondet_uchar() [L133] input_73 = __VERIFIER_nondet_uchar() [L134] input_79 = __VERIFIER_nondet_uchar() [L135] input_81 = __VERIFIER_nondet_uchar() [L136] input_95 = __VERIFIER_nondet_uchar() [L137] input_101 = __VERIFIER_nondet_uchar() [L138] input_107 = __VERIFIER_nondet_uchar() [L139] input_113 = __VERIFIER_nondet_uchar() [L140] input_114 = __VERIFIER_nondet_uchar() [L141] input_115 = __VERIFIER_nondet_uchar() [L142] input_134 = __VERIFIER_nondet_ushort() [L143] input_143 = __VERIFIER_nondet_uchar() [L144] input_144 = __VERIFIER_nondet_uchar() [L145] input_145 = __VERIFIER_nondet_uchar() [L148] SORT_1 var_11_arg_0 = state_8; [L149] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L150] SORT_10 var_11 = var_11_arg_0; [L151] SORT_10 var_13_arg_0 = var_11; [L152] SORT_10 var_13_arg_1 = var_12; [L153] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L154] SORT_1 var_16_arg_0 = state_14; [L155] var_16_arg_0 = var_16_arg_0 & mask_SORT_1 [L156] SORT_10 var_16 = var_16_arg_0; [L157] SORT_10 var_17_arg_0 = var_16; [L158] SORT_10 var_17_arg_1 = var_12; [L159] SORT_1 var_17 = var_17_arg_0 == var_17_arg_1; [L160] SORT_1 var_18_arg_0 = var_13; [L161] SORT_1 var_18_arg_1 = var_17; [L162] SORT_1 var_18 = var_18_arg_0 | var_18_arg_1; [L163] SORT_1 var_22_arg_0 = var_18; [L164] SORT_1 var_22 = ~var_22_arg_0; [L165] SORT_1 var_23_arg_0 = var_21; [L166] SORT_1 var_23_arg_1 = var_22; [L167] SORT_1 var_23 = var_23_arg_0 & var_23_arg_1; [L168] var_23 = var_23 & mask_SORT_1 [L169] SORT_1 bad_24_arg_0 = var_23; [L170] CALL __VERIFIER_assert(!(bad_24_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: 0.5s, 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, 0.1s 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 04:10:52,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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 f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab --- 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 04:10:55,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:10:55,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:10:55,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:10:55,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:10:55,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:10:55,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:10:55,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:10:55,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:10:55,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:10:55,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:10:55,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:10:55,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:10:55,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:10:55,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:10:55,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:10:55,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:10:55,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:10:55,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:10:55,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:10:55,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:10:55,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:10:55,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:10:55,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:10:55,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:10:55,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:10:55,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:10:55,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:10:55,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:10:55,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:10:55,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:10:55,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:10:55,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:10:55,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:10:55,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:10:55,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:10:55,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:10:55,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:10:55,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:10:55,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:10:55,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:10:55,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:10:55,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:10:55,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:10:55,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:10:55,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:10:55,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:10:55,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:10:55,255 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:10:55,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:10:55,255 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:10:55,256 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:10:55,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:10:55,257 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:10:55,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:10:55,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:10:55,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:10:55,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:10:55,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:10:55,260 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:10:55,260 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:10:55,260 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:10:55,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:10:55,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:10:55,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:10:55,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:10:55,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:10:55,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:10:55,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:55,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:10:55,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:10:55,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:10:55,263 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:10:55,263 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:55,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:10:55,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:10:55,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:10:55,264 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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f949838c97095a42d5e6540bf73aedcc362763afd8b26091976cc471e7bc2aab [2022-11-03 04:10:55,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:10:55,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:10:55,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:10:55,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:10:55,663 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:10:55,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-03 04:10:55,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/34724fb3c/3e5b7bb33e7f476ca76001c145dc1474/FLAG2f83479d1 [2022-11-03 04:10:56,354 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:10:56,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-03 04:10:56,373 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/34724fb3c/3e5b7bb33e7f476ca76001c145dc1474/FLAG2f83479d1 [2022-11-03 04:10:56,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/data/34724fb3c/3e5b7bb33e7f476ca76001c145dc1474 [2022-11-03 04:10:56,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:10:56,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:10:56,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:56,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:10:56,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:10:56,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:56" (1/1) ... [2022-11-03 04:10:56,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455deff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:56, skipping insertion in model container [2022-11-03 04:10:56,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:56" (1/1) ... [2022-11-03 04:10:56,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:10:56,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:10:56,902 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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-03 04:10:57,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:57,024 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:10:57,065 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_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c[1107,1120] [2022-11-03 04:10:57,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:57,182 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:10:57,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57 WrapperNode [2022-11-03 04:10:57,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:57,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:57,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:10:57,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:10:57,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,288 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 571 [2022-11-03 04:10:57,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:57,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:10:57,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:10:57,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:10:57,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,362 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:10:57,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:10:57,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:10:57,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:10:57,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (1/1) ... [2022-11-03 04:10:57,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:57,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:10:57,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:10:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:10:57,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:10:57,745 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:10:57,747 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:10:58,333 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:10:58,341 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:10:58,342 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:10:58,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:58 BoogieIcfgContainer [2022-11-03 04:10:58,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:10:58,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:10:58,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:10:58,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:10:58,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:56" (1/3) ... [2022-11-03 04:10:58,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ae92ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:58, skipping insertion in model container [2022-11-03 04:10:58,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:57" (2/3) ... [2022-11-03 04:10:58,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ae92ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:58, skipping insertion in model container [2022-11-03 04:10:58,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:58" (3/3) ... [2022-11-03 04:10:58,353 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p13.c [2022-11-03 04:10:58,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:10:58,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:10:58,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:10:58,455 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;@133e520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:10:58,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:10:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 86 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 04:10:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:10:58,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:58,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:10:58,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:10:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:58,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992653940] [2022-11-03 04:10:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:58,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:58,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:58,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:10:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:10:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:58,959 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 04:10:58,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:58,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:58,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992653940] [2022-11-03 04:10:58,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992653940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:58,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:58,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:58,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51839755] [2022-11-03 04:10:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:58,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:59,022 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 86 states have internal predecessors, (127), 0 states have call successors, (0), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states 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 04:10:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:59,226 INFO L93 Difference]: Finished difference Result 248 states and 372 transitions. [2022-11-03 04:10:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 04:10:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:59,239 INFO L225 Difference]: With dead ends: 248 [2022-11-03 04:10:59,239 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 04:10:59,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:10:59,246 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 231 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:59,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 317 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 04:10:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 85. [2022-11-03 04:10:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 04:10:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2022-11-03 04:10:59,287 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 123 transitions. Word has length 5 [2022-11-03 04:10:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:59,287 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 123 transitions. [2022-11-03 04:10:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states 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 04:10:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2022-11-03 04:10:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:10:59,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:59,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:59,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:59,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:59,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash -345221643, now seen corresponding path program 1 times [2022-11-03 04:10:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176921734] [2022-11-03 04:10:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:59,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:59,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:10:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:59,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:10:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:59,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:59,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176921734] [2022-11-03 04:10:59,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176921734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:59,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:59,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:59,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690599933] [2022-11-03 04:10:59,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:59,928 INFO L87 Difference]: Start difference. First operand 85 states and 123 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:10:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:59,992 INFO L93 Difference]: Finished difference Result 323 states and 474 transitions. [2022-11-03 04:10:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:10:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:59,994 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:10:59,995 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:10:59,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:10:59,997 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 332 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:59,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 465 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:10:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 91. [2022-11-03 04:11:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4555555555555555) internal successors, (131), 90 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 04:11:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 131 transitions. [2022-11-03 04:11:00,008 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 131 transitions. Word has length 84 [2022-11-03 04:11:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:00,008 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 131 transitions. [2022-11-03 04:11:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 131 transitions. [2022-11-03 04:11:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:00,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:00,011 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:00,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:00,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1388882807, now seen corresponding path program 1 times [2022-11-03 04:11:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:00,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320854839] [2022-11-03 04:11:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:00,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:00,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:00,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:11:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:00,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:00,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320854839] [2022-11-03 04:11:00,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320854839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:00,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:00,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221552742] [2022-11-03 04:11:00,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:00,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:00,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:00,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:00,570 INFO L87 Difference]: Start difference. First operand 91 states and 131 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:00,617 INFO L93 Difference]: Finished difference Result 323 states and 473 transitions. [2022-11-03 04:11:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:00,619 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:00,620 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:00,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:00,622 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 321 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:00,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 461 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 95. [2022-11-03 04:11:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.446808510638298) internal successors, (136), 94 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 04:11:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-11-03 04:11:00,631 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 84 [2022-11-03 04:11:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:00,632 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-11-03 04:11:00,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-11-03 04:11:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:00,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:00,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:00,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:00,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 421532153, now seen corresponding path program 1 times [2022-11-03 04:11:00,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:00,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800565754] [2022-11-03 04:11:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:00,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:00,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:00,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:11:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:01,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:01,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800565754] [2022-11-03 04:11:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800565754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:01,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:01,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961561648] [2022-11-03 04:11:01,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:01,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:01,157 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:01,191 INFO L93 Difference]: Finished difference Result 323 states and 472 transitions. [2022-11-03 04:11:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:01,193 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:01,194 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:01,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:01,196 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 315 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:01,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 460 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 97. [2022-11-03 04:11:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4375) internal successors, (138), 96 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 04:11:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2022-11-03 04:11:01,203 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 84 [2022-11-03 04:11:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:01,203 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2022-11-03 04:11:01,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2022-11-03 04:11:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:01,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:01,205 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:01,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:01,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:01,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -71094021, now seen corresponding path program 1 times [2022-11-03 04:11:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:01,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987200450] [2022-11-03 04:11:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:01,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:01,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:01,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:01,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:11:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:01,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:01,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:01,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987200450] [2022-11-03 04:11:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987200450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:01,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:01,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852490984] [2022-11-03 04:11:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:01,731 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:01,760 INFO L93 Difference]: Finished difference Result 323 states and 471 transitions. [2022-11-03 04:11:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:01,762 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:01,762 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:01,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:01,764 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 309 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:01,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 462 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 99. [2022-11-03 04:11:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4285714285714286) internal successors, (140), 98 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 04:11:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 140 transitions. [2022-11-03 04:11:01,771 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 140 transitions. Word has length 84 [2022-11-03 04:11:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:01,771 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 140 transitions. [2022-11-03 04:11:01,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 140 transitions. [2022-11-03 04:11:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:01,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:01,773 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:01,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:01,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:01,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1287247747, now seen corresponding path program 1 times [2022-11-03 04:11:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774800482] [2022-11-03 04:11:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:01,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:02,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:11:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:02,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:02,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:02,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774800482] [2022-11-03 04:11:02,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774800482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:02,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:02,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020645261] [2022-11-03 04:11:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:02,306 INFO L87 Difference]: Start difference. First operand 99 states and 140 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:02,338 INFO L93 Difference]: Finished difference Result 323 states and 470 transitions. [2022-11-03 04:11:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:02,341 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:02,341 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:02,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:02,346 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 293 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:02,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 458 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 105. [2022-11-03 04:11:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 04:11:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2022-11-03 04:11:02,362 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 84 [2022-11-03 04:11:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:02,363 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2022-11-03 04:11:02,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2022-11-03 04:11:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:02,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:02,370 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:02,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:02,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 674326911, now seen corresponding path program 1 times [2022-11-03 04:11:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662254919] [2022-11-03 04:11:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:02,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:02,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:11:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:02,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:02,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:02,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662254919] [2022-11-03 04:11:02,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662254919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:02,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:02,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:02,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601613085] [2022-11-03 04:11:02,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:02,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:02,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:02,882 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:02,916 INFO L93 Difference]: Finished difference Result 323 states and 469 transitions. [2022-11-03 04:11:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:02,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:02,919 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:02,919 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:02,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:02,920 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 287 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:02,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 460 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 107. [2022-11-03 04:11:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 106 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 04:11:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2022-11-03 04:11:02,936 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 84 [2022-11-03 04:11:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:02,937 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2022-11-03 04:11:02,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2022-11-03 04:11:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:02,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:02,947 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:02,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:03,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1235026689, now seen corresponding path program 1 times [2022-11-03 04:11:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:03,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012293093] [2022-11-03 04:11:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:03,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:03,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:11:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:03,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:03,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:03,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012293093] [2022-11-03 04:11:03,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012293093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:03,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:03,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637832054] [2022-11-03 04:11:03,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:03,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:03,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:03,484 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:03,517 INFO L93 Difference]: Finished difference Result 323 states and 468 transitions. [2022-11-03 04:11:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:03,520 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:03,521 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:03,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:03,523 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 281 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:03,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 459 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 109. [2022-11-03 04:11:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4074074074074074) internal successors, (152), 108 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 04:11:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 152 transitions. [2022-11-03 04:11:03,530 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 152 transitions. Word has length 84 [2022-11-03 04:11:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:03,530 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 152 transitions. [2022-11-03 04:11:03,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 152 transitions. [2022-11-03 04:11:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:03,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:03,533 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:03,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:03,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1799023357, now seen corresponding path program 1 times [2022-11-03 04:11:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:03,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078851983] [2022-11-03 04:11:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:03,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:03,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:03,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:03,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:11:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:03,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:04,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:04,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:04,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078851983] [2022-11-03 04:11:04,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078851983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:04,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:04,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:04,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029636305] [2022-11-03 04:11:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:04,053 INFO L87 Difference]: Start difference. First operand 109 states and 152 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:04,097 INFO L93 Difference]: Finished difference Result 323 states and 467 transitions. [2022-11-03 04:11:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:04,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:04,099 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:04,099 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:04,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:04,102 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 270 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:04,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 455 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 113. [2022-11-03 04:11:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4017857142857142) internal successors, (157), 112 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2022-11-03 04:11:04,107 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 157 transitions. Word has length 84 [2022-11-03 04:11:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:04,108 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 157 transitions. [2022-11-03 04:11:04,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 157 transitions. [2022-11-03 04:11:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:04,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:04,109 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:04,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:04,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:04,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1355122683, now seen corresponding path program 1 times [2022-11-03 04:11:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:04,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554783965] [2022-11-03 04:11:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:04,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:04,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:04,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:11:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:04,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:04,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:04,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554783965] [2022-11-03 04:11:04,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554783965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:04,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:04,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:04,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935263439] [2022-11-03 04:11:04,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:04,676 INFO L87 Difference]: Start difference. First operand 113 states and 157 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:04,715 INFO L93 Difference]: Finished difference Result 323 states and 466 transitions. [2022-11-03 04:11:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:04,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:04,717 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:04,717 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:04,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:04,718 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 264 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:04,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 454 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 115. [2022-11-03 04:11:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.394736842105263) internal successors, (159), 114 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 159 transitions. [2022-11-03 04:11:04,724 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 159 transitions. Word has length 84 [2022-11-03 04:11:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:04,725 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 159 transitions. [2022-11-03 04:11:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 159 transitions. [2022-11-03 04:11:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:04,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:04,729 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:04,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-03 04:11:04,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:04,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 911258503, now seen corresponding path program 1 times [2022-11-03 04:11:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:04,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633140915] [2022-11-03 04:11:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:04,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:04,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:04,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:04,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:11:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:05,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:05,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633140915] [2022-11-03 04:11:05,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633140915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:05,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:05,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:05,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802927818] [2022-11-03 04:11:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:05,261 INFO L87 Difference]: Start difference. First operand 115 states and 159 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:05,324 INFO L93 Difference]: Finished difference Result 323 states and 465 transitions. [2022-11-03 04:11:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:05,327 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:05,327 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:05,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:05,328 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 253 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:05,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 441 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 119. [2022-11-03 04:11:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3898305084745763) internal successors, (164), 118 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 04:11:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 164 transitions. [2022-11-03 04:11:05,335 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 164 transitions. Word has length 84 [2022-11-03 04:11:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:05,335 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 164 transitions. [2022-11-03 04:11:05,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 164 transitions. [2022-11-03 04:11:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:05,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:05,337 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:05,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:05,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:05,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash 558170121, now seen corresponding path program 1 times [2022-11-03 04:11:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:05,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304453854] [2022-11-03 04:11:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:05,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:05,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:05,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:11:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:05,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:05,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:05,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304453854] [2022-11-03 04:11:05,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304453854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:05,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:05,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994564150] [2022-11-03 04:11:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:05,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:05,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:05,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:05,880 INFO L87 Difference]: Start difference. First operand 119 states and 164 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:05,936 INFO L93 Difference]: Finished difference Result 323 states and 464 transitions. [2022-11-03 04:11:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:05,939 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:05,939 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:05,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:05,940 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 237 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:05,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 440 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2022-11-03 04:11:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 04:11:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-11-03 04:11:05,946 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 84 [2022-11-03 04:11:05,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:05,947 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-11-03 04:11:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-11-03 04:11:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:05,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:05,949 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:05,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:06,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 981816843, now seen corresponding path program 1 times [2022-11-03 04:11:06,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:06,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537877489] [2022-11-03 04:11:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:06,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:11:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:06,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:06,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:06,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:06,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537877489] [2022-11-03 04:11:06,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537877489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:06,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:06,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469196385] [2022-11-03 04:11:06,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:06,619 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:06,714 INFO L93 Difference]: Finished difference Result 323 states and 463 transitions. [2022-11-03 04:11:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:06,716 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:06,716 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:06,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:06,718 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 231 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:06,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 415 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 127. [2022-11-03 04:11:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.380952380952381) internal successors, (174), 126 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-11-03 04:11:06,726 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 84 [2022-11-03 04:11:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:06,726 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-11-03 04:11:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-11-03 04:11:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:06,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:06,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:06,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:06,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash -863550323, now seen corresponding path program 1 times [2022-11-03 04:11:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:06,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389606637] [2022-11-03 04:11:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:06,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:06,943 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:06,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:11:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:07,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:07,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:07,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:07,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389606637] [2022-11-03 04:11:07,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389606637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:07,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:07,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:07,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030093268] [2022-11-03 04:11:07,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:07,493 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:07,586 INFO L93 Difference]: Finished difference Result 368 states and 527 transitions. [2022-11-03 04:11:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:07,588 INFO L225 Difference]: With dead ends: 368 [2022-11-03 04:11:07,588 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 04:11:07,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:07,589 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 407 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:07,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 668 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 04:11:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 129. [2022-11-03 04:11:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.375) internal successors, (176), 128 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 04:11:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 176 transitions. [2022-11-03 04:11:07,596 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 176 transitions. Word has length 84 [2022-11-03 04:11:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:07,596 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 176 transitions. [2022-11-03 04:11:07,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 176 transitions. [2022-11-03 04:11:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:07,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:07,598 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:07,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:07,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:07,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash -204018801, now seen corresponding path program 1 times [2022-11-03 04:11:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209527012] [2022-11-03 04:11:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:07,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:07,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:07,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:07,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:11:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:08,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:08,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:08,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209527012] [2022-11-03 04:11:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209527012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:08,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:08,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:08,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659368863] [2022-11-03 04:11:08,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:08,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:08,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:08,144 INFO L87 Difference]: Start difference. First operand 129 states and 176 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:08,217 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2022-11-03 04:11:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:08,219 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:08,219 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:08,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:08,220 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 219 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:08,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 428 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 131. [2022-11-03 04:11:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3692307692307693) internal successors, (178), 130 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-11-03 04:11:08,226 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 84 [2022-11-03 04:11:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:08,226 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-11-03 04:11:08,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-11-03 04:11:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:08,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:08,228 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:08,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:08,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:08,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1048024303, now seen corresponding path program 1 times [2022-11-03 04:11:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:08,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049153283] [2022-11-03 04:11:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:08,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:08,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:08,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:11:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:08,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:09,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:09,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049153283] [2022-11-03 04:11:09,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049153283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:09,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:09,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680416425] [2022-11-03 04:11:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:09,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:09,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:09,021 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:09,112 INFO L93 Difference]: Finished difference Result 368 states and 525 transitions. [2022-11-03 04:11:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:09,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:09,114 INFO L225 Difference]: With dead ends: 368 [2022-11-03 04:11:09,114 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 04:11:09,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:09,115 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 393 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:09,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 660 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 04:11:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 133. [2022-11-03 04:11:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 132 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 04:11:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 180 transitions. [2022-11-03 04:11:09,125 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 180 transitions. Word has length 84 [2022-11-03 04:11:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:09,125 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 180 transitions. [2022-11-03 04:11:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 180 transitions. [2022-11-03 04:11:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:09,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:09,126 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:09,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:09,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:09,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1120410861, now seen corresponding path program 1 times [2022-11-03 04:11:09,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406813145] [2022-11-03 04:11:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:09,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:09,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:09,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:09,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:11:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:09,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:09,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406813145] [2022-11-03 04:11:09,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406813145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:09,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:09,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:09,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028441015] [2022-11-03 04:11:09,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:09,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:09,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:09,681 INFO L87 Difference]: Start difference. First operand 133 states and 180 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:09,758 INFO L93 Difference]: Finished difference Result 323 states and 459 transitions. [2022-11-03 04:11:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:09,760 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:09,760 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:09,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:09,761 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 202 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:09,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 426 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 137. [2022-11-03 04:11:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3602941176470589) internal successors, (185), 136 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 04:11:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2022-11-03 04:11:09,766 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 84 [2022-11-03 04:11:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:09,766 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2022-11-03 04:11:09,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2022-11-03 04:11:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:09,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:09,768 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:09,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:09,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:09,983 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 265792533, now seen corresponding path program 1 times [2022-11-03 04:11:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:09,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53959087] [2022-11-03 04:11:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:09,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:09,986 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:09,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 04:11:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:10,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:10,307 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:10,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53959087] [2022-11-03 04:11:10,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53959087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:10,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:10,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506272512] [2022-11-03 04:11:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:10,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:10,309 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:10,359 INFO L93 Difference]: Finished difference Result 323 states and 458 transitions. [2022-11-03 04:11:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:10,361 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:10,362 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:10,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:10,363 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 196 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:10,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 434 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 139. [2022-11-03 04:11:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.355072463768116) internal successors, (187), 138 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 04:11:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 187 transitions. [2022-11-03 04:11:10,369 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 187 transitions. Word has length 84 [2022-11-03 04:11:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:10,369 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 187 transitions. [2022-11-03 04:11:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 187 transitions. [2022-11-03 04:11:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:10,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:10,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:10,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:10,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:10,586 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2105946729, now seen corresponding path program 1 times [2022-11-03 04:11:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:10,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419032991] [2022-11-03 04:11:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:10,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:10,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:10,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 04:11:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:10,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:10,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:10,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419032991] [2022-11-03 04:11:10,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419032991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:10,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:10,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25169638] [2022-11-03 04:11:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:10,901 INFO L87 Difference]: Start difference. First operand 139 states and 187 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:10,947 INFO L93 Difference]: Finished difference Result 323 states and 457 transitions. [2022-11-03 04:11:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:10,949 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:10,949 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:10,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:10,950 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 190 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:10,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 448 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 141. [2022-11-03 04:11:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.35) internal successors, (189), 140 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 04:11:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 189 transitions. [2022-11-03 04:11:10,956 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 189 transitions. Word has length 84 [2022-11-03 04:11:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:10,956 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 189 transitions. [2022-11-03 04:11:10,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 189 transitions. [2022-11-03 04:11:10,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:10,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:10,958 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:10,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:11,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:11,180 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1965398119, now seen corresponding path program 1 times [2022-11-03 04:11:11,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:11,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455495932] [2022-11-03 04:11:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:11,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:11,183 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:11,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:11:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:11,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:11,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:11,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:11,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:11,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455495932] [2022-11-03 04:11:11,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455495932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:11,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:11,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:11,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918105887] [2022-11-03 04:11:11,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:11,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:11,522 INFO L87 Difference]: Start difference. First operand 141 states and 189 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:11,555 INFO L93 Difference]: Finished difference Result 323 states and 456 transitions. [2022-11-03 04:11:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:11,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:11,557 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:11,557 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:11,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:11,558 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 184 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:11,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 444 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 143. [2022-11-03 04:11:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3450704225352113) internal successors, (191), 142 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 191 transitions. [2022-11-03 04:11:11,563 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 191 transitions. Word has length 84 [2022-11-03 04:11:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:11,564 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 191 transitions. [2022-11-03 04:11:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 191 transitions. [2022-11-03 04:11:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:11,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:11,565 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:11,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:11,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:11,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash 524130843, now seen corresponding path program 1 times [2022-11-03 04:11:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:11,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398915484] [2022-11-03 04:11:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:11,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:11,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:11,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:11,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:11:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:11,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:12,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:12,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398915484] [2022-11-03 04:11:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398915484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:12,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:12,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:12,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781271397] [2022-11-03 04:11:12,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:12,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:12,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:12,323 INFO L87 Difference]: Start difference. First operand 143 states and 191 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:12,411 INFO L93 Difference]: Finished difference Result 368 states and 520 transitions. [2022-11-03 04:11:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:12,413 INFO L225 Difference]: With dead ends: 368 [2022-11-03 04:11:12,413 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 04:11:12,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:12,415 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 353 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:12,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 638 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 04:11:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 145. [2022-11-03 04:11:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3402777777777777) internal successors, (193), 144 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 04:11:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 193 transitions. [2022-11-03 04:11:12,420 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 193 transitions. Word has length 84 [2022-11-03 04:11:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:12,421 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 193 transitions. [2022-11-03 04:11:12,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 193 transitions. [2022-11-03 04:11:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:12,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:12,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:12,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:12,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:12,636 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 946832669, now seen corresponding path program 1 times [2022-11-03 04:11:12,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888288612] [2022-11-03 04:11:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:12,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:12,638 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:12,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:11:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:12,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:12,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:12,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:12,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888288612] [2022-11-03 04:11:12,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888288612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:12,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:12,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092091575] [2022-11-03 04:11:12,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:12,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:12,966 INFO L87 Difference]: Start difference. First operand 145 states and 193 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:13,030 INFO L93 Difference]: Finished difference Result 323 states and 454 transitions. [2022-11-03 04:11:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:13,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:13,032 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:13,032 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:13,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:13,034 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 172 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:13,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 421 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 147. [2022-11-03 04:11:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 146 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-11-03 04:11:13,040 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 84 [2022-11-03 04:11:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:13,040 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-11-03 04:11:13,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-11-03 04:11:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:13,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:13,045 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:13,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:13,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:13,258 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash -742111073, now seen corresponding path program 1 times [2022-11-03 04:11:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:13,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17609437] [2022-11-03 04:11:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:13,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:13,260 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:13,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:11:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:13,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:13,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:13,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17609437] [2022-11-03 04:11:13,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17609437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:13,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:13,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727927878] [2022-11-03 04:11:13,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:13,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:13,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:13,557 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:13,623 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2022-11-03 04:11:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:13,625 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:13,625 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:13,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:13,626 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 166 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:13,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 420 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 149. [2022-11-03 04:11:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 148 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 04:11:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2022-11-03 04:11:13,632 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 84 [2022-11-03 04:11:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:13,633 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2022-11-03 04:11:13,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2022-11-03 04:11:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:13,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:13,634 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:13,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:13,847 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1964508321, now seen corresponding path program 1 times [2022-11-03 04:11:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:13,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745194234] [2022-11-03 04:11:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:13,849 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:13,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:11:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:14,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:14,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:14,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745194234] [2022-11-03 04:11:14,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745194234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:14,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360196537] [2022-11-03 04:11:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:14,325 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:14,417 INFO L93 Difference]: Finished difference Result 323 states and 452 transitions. [2022-11-03 04:11:14,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:14,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:14,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:14,418 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:14,419 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:14,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:14,419 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 160 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:14,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 404 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 151. [2022-11-03 04:11:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 150 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2022-11-03 04:11:14,426 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 84 [2022-11-03 04:11:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:14,426 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2022-11-03 04:11:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2022-11-03 04:11:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:14,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:14,427 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:14,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:14,640 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash 684644643, now seen corresponding path program 1 times [2022-11-03 04:11:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:14,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113999858] [2022-11-03 04:11:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:14,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:14,642 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:14,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:11:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:14,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:14,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:14,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:14,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113999858] [2022-11-03 04:11:14,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113999858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:14,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:14,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:14,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167665312] [2022-11-03 04:11:14,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:14,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:14,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:14,956 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:15,021 INFO L93 Difference]: Finished difference Result 323 states and 451 transitions. [2022-11-03 04:11:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:15,023 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:15,024 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:15,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:15,027 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 149 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:15,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 418 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2022-11-03 04:11:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 154 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 04:11:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 204 transitions. [2022-11-03 04:11:15,032 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 204 transitions. Word has length 84 [2022-11-03 04:11:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:15,032 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 204 transitions. [2022-11-03 04:11:15,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 204 transitions. [2022-11-03 04:11:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:15,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:15,034 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:15,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:15,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:15,246 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1385709221, now seen corresponding path program 1 times [2022-11-03 04:11:15,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:15,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532556267] [2022-11-03 04:11:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:15,249 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:15,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:11:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:15,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:15,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532556267] [2022-11-03 04:11:15,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532556267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:15,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:15,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253463547] [2022-11-03 04:11:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:15,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:15,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:15,807 INFO L87 Difference]: Start difference. First operand 155 states and 204 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:15,887 INFO L93 Difference]: Finished difference Result 368 states and 515 transitions. [2022-11-03 04:11:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:15,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:15,889 INFO L225 Difference]: With dead ends: 368 [2022-11-03 04:11:15,890 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 04:11:15,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:15,891 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 313 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:15,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 615 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 04:11:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 157. [2022-11-03 04:11:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3205128205128205) internal successors, (206), 156 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 04:11:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2022-11-03 04:11:15,897 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 84 [2022-11-03 04:11:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:15,897 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2022-11-03 04:11:15,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2022-11-03 04:11:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:15,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:15,899 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:15,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:16,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:16,112 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2065767591, now seen corresponding path program 1 times [2022-11-03 04:11:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:16,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853262214] [2022-11-03 04:11:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:16,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:16,114 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 04:11:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:16,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:16,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:16,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853262214] [2022-11-03 04:11:16,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853262214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:16,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:16,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964434690] [2022-11-03 04:11:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:16,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:16,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:16,420 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:16,484 INFO L93 Difference]: Finished difference Result 323 states and 449 transitions. [2022-11-03 04:11:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:16,486 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:16,486 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:16,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:16,487 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 137 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:16,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 416 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 159. [2022-11-03 04:11:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3164556962025316) internal successors, (208), 158 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 04:11:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 208 transitions. [2022-11-03 04:11:16,499 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 208 transitions. Word has length 84 [2022-11-03 04:11:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:16,500 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 208 transitions. [2022-11-03 04:11:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 208 transitions. [2022-11-03 04:11:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:16,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:16,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:16,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:16,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:16,710 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash -454192343, now seen corresponding path program 1 times [2022-11-03 04:11:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:16,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653461870] [2022-11-03 04:11:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:16,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:16,712 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:16,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:11:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:16,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:11:16,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:17,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:17,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653461870] [2022-11-03 04:11:17,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653461870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:17,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:17,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:17,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203779252] [2022-11-03 04:11:17,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:17,065 INFO L87 Difference]: Start difference. First operand 159 states and 208 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:17,129 INFO L93 Difference]: Finished difference Result 323 states and 448 transitions. [2022-11-03 04:11:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:17,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:17,131 INFO L225 Difference]: With dead ends: 323 [2022-11-03 04:11:17,131 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 04:11:17,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 04:11:17,132 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 131 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:17,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 415 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 04:11:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 161. [2022-11-03 04:11:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3125) internal successors, (210), 160 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 04:11:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-03 04:11:17,140 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 84 [2022-11-03 04:11:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:17,141 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-03 04:11:17,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 04:11:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-03 04:11:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:11:17,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:17,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:17,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:17,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:17,343 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -452345301, now seen corresponding path program 1 times [2022-11-03 04:11:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833056574] [2022-11-03 04:11:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:17,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:17,345 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 04:11:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:11:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:11:18,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:11:20,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833056574] [2022-11-03 04:11:20,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833056574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:20,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689744552] [2022-11-03 04:11:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:20,048 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:20,051 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:20,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 04:11:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:11:20,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:11:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:11:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1689744552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309623789] [2022-11-03 04:11:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:21,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:21,931 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:21,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 04:11:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 04:11:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:22,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:24,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309623789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:24,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:11:24,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 34 [2022-11-03 04:11:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47085633] [2022-11-03 04:11:24,957 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:11:24,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:11:24,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:11:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:11:24,959 INFO L87 Difference]: Start difference. First operand 161 states and 210 transitions. Second operand has 34 states, 34 states have (on average 9.647058823529411) internal successors, (328), 34 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 04:11:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:26,886 INFO L93 Difference]: Finished difference Result 465 states and 629 transitions. [2022-11-03 04:11:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 04:11:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 9.647058823529411) internal successors, (328), 34 states have internal predecessors, (328), 0 states have call successors, (0), 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 84 [2022-11-03 04:11:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:26,888 INFO L225 Difference]: With dead ends: 465 [2022-11-03 04:11:26,888 INFO L226 Difference]: Without dead ends: 463 [2022-11-03 04:11:26,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 463 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=576, Invalid=3584, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 04:11:26,890 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1512 mSDsluCounter, 3600 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 3768 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:26,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1512 Valid, 3768 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 348 Invalid, 0 Unknown, 902 Unchecked, 0.5s Time] [2022-11-03 04:11:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-03 04:11:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 240. [2022-11-03 04:11:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.3682008368200838) internal successors, (327), 239 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 04:11:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 327 transitions. [2022-11-03 04:11:26,904 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 327 transitions. Word has length 84 [2022-11-03 04:11:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:26,905 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 327 transitions. [2022-11-03 04:11:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.647058823529411) internal successors, (328), 34 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 04:11:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 327 transitions. [2022-11-03 04:11:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:26,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:26,907 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:26,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:27,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-03 04:11:27,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:27,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:27,516 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1964626963, now seen corresponding path program 1 times [2022-11-03 04:11:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:27,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400780158] [2022-11-03 04:11:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:27,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:27,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:27,518 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:27,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 04:11:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:28,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:28,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400780158] [2022-11-03 04:11:28,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400780158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:28,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795562200] [2022-11-03 04:11:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:28,382 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:28,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 04:11:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:28,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:11:28,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:28,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795562200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:28,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:28,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:28,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542405713] [2022-11-03 04:11:28,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:28,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:28,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:28,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:28,844 INFO L87 Difference]: Start difference. First operand 240 states and 327 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 04:11:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:28,925 INFO L93 Difference]: Finished difference Result 657 states and 921 transitions. [2022-11-03 04:11:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:28,929 INFO L225 Difference]: With dead ends: 657 [2022-11-03 04:11:28,929 INFO L226 Difference]: Without dead ends: 439 [2022-11-03 04:11:28,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:28,931 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 489 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:28,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 499 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-03 04:11:28,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 244. [2022-11-03 04:11:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.3580246913580247) internal successors, (330), 243 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 04:11:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 330 transitions. [2022-11-03 04:11:28,947 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 330 transitions. Word has length 163 [2022-11-03 04:11:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:28,947 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 330 transitions. [2022-11-03 04:11:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 04:11:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 330 transitions. [2022-11-03 04:11:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:28,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:28,949 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:28,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 04:11:29,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-03 04:11:29,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:29,359 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash -368765675, now seen corresponding path program 1 times [2022-11-03 04:11:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:29,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014533436] [2022-11-03 04:11:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:29,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:29,362 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:29,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 04:11:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:29,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:29,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:30,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014533436] [2022-11-03 04:11:30,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014533436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039660367] [2022-11-03 04:11:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:30,160 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:30,162 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:30,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 04:11:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:30,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:11:30,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:30,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2039660367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:30,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:30,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:30,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791693054] [2022-11-03 04:11:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:30,677 INFO L87 Difference]: Start difference. First operand 244 states and 330 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:30,789 INFO L93 Difference]: Finished difference Result 854 states and 1198 transitions. [2022-11-03 04:11:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:30,793 INFO L225 Difference]: With dead ends: 854 [2022-11-03 04:11:30,793 INFO L226 Difference]: Without dead ends: 618 [2022-11-03 04:11:30,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:30,794 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 582 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:30,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 438 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-03 04:11:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 308. [2022-11-03 04:11:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3713355048859934) internal successors, (421), 307 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 04:11:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 421 transitions. [2022-11-03 04:11:30,806 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 421 transitions. Word has length 163 [2022-11-03 04:11:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:30,806 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 421 transitions. [2022-11-03 04:11:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 421 transitions. [2022-11-03 04:11:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:30,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:30,808 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:30,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:31,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 04:11:31,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:31,212 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash -721854057, now seen corresponding path program 1 times [2022-11-03 04:11:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:31,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201708363] [2022-11-03 04:11:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:31,214 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:31,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 04:11:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:31,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:31,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:31,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201708363] [2022-11-03 04:11:31,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201708363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:31,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590801656] [2022-11-03 04:11:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:31,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:31,982 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:31,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 04:11:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:11:32,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:32,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1590801656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:32,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:32,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266976586] [2022-11-03 04:11:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:32,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:32,429 INFO L87 Difference]: Start difference. First operand 308 states and 421 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 04:11:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:32,518 INFO L93 Difference]: Finished difference Result 922 states and 1298 transitions. [2022-11-03 04:11:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:32,522 INFO L225 Difference]: With dead ends: 922 [2022-11-03 04:11:32,522 INFO L226 Difference]: Without dead ends: 694 [2022-11-03 04:11:32,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:32,523 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 292 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:32,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 692 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-03 04:11:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 328. [2022-11-03 04:11:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3669724770642202) internal successors, (447), 327 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 04:11:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 447 transitions. [2022-11-03 04:11:32,534 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 447 transitions. Word has length 163 [2022-11-03 04:11:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:32,535 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 447 transitions. [2022-11-03 04:11:32,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 04:11:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 447 transitions. [2022-11-03 04:11:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:32,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:32,537 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:32,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:32,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 04:11:32,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:32,940 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1615340395, now seen corresponding path program 1 times [2022-11-03 04:11:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:32,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043836540] [2022-11-03 04:11:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:32,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:32,942 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:32,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:11:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:33,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:33,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:33,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043836540] [2022-11-03 04:11:33,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043836540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:33,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822600811] [2022-11-03 04:11:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:33,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:33,699 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:33,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 04:11:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:11:34,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:34,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822600811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:34,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:34,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:34,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42668477] [2022-11-03 04:11:34,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:34,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:34,191 INFO L87 Difference]: Start difference. First operand 328 states and 447 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:34,289 INFO L93 Difference]: Finished difference Result 926 states and 1309 transitions. [2022-11-03 04:11:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:34,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:34,293 INFO L225 Difference]: With dead ends: 926 [2022-11-03 04:11:34,293 INFO L226 Difference]: Without dead ends: 678 [2022-11-03 04:11:34,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:34,294 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 582 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:34,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 437 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-11-03 04:11:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 344. [2022-11-03 04:11:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.3615160349854227) internal successors, (467), 343 states have internal predecessors, (467), 0 states have call successors, (0), 0 states 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 04:11:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 467 transitions. [2022-11-03 04:11:34,306 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 467 transitions. Word has length 163 [2022-11-03 04:11:34,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:34,306 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 467 transitions. [2022-11-03 04:11:34,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 467 transitions. [2022-11-03 04:11:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:34,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:34,308 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:34,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:34,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-03 04:11:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:34,723 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1191693673, now seen corresponding path program 1 times [2022-11-03 04:11:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953516143] [2022-11-03 04:11:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:34,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:34,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:34,725 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 04:11:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:35,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:35,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953516143] [2022-11-03 04:11:35,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953516143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:35,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749992753] [2022-11-03 04:11:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:35,461 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:35,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:35,463 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:35,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 04:11:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:11:35,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:35,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749992753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:35,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:35,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:35,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765587199] [2022-11-03 04:11:35,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:35,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:35,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:35,940 INFO L87 Difference]: Start difference. First operand 344 states and 467 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:11:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:36,080 INFO L93 Difference]: Finished difference Result 964 states and 1346 transitions. [2022-11-03 04:11:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:36,083 INFO L225 Difference]: With dead ends: 964 [2022-11-03 04:11:36,083 INFO L226 Difference]: Without dead ends: 700 [2022-11-03 04:11:36,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:36,087 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 233 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:36,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 685 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-03 04:11:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 352. [2022-11-03 04:11:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.358974358974359) internal successors, (477), 351 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 04:11:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 477 transitions. [2022-11-03 04:11:36,101 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 477 transitions. Word has length 163 [2022-11-03 04:11:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:36,101 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 477 transitions. [2022-11-03 04:11:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:11:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 477 transitions. [2022-11-03 04:11:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:36,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:36,103 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:36,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:36,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 04:11:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:36,507 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1893293547, now seen corresponding path program 1 times [2022-11-03 04:11:36,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:36,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8530075] [2022-11-03 04:11:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:36,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:36,509 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 04:11:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:37,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:37,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:37,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8530075] [2022-11-03 04:11:37,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8530075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:37,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1405170734] [2022-11-03 04:11:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:37,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:37,275 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:37,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 04:11:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:11:37,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:37,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1405170734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:37,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:37,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:37,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074756576] [2022-11-03 04:11:37,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:37,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:37,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:37,767 INFO L87 Difference]: Start difference. First operand 352 states and 477 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:37,872 INFO L93 Difference]: Finished difference Result 1010 states and 1417 transitions. [2022-11-03 04:11:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:37,875 INFO L225 Difference]: With dead ends: 1010 [2022-11-03 04:11:37,875 INFO L226 Difference]: Without dead ends: 738 [2022-11-03 04:11:37,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:37,876 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 591 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:37,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 431 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-11-03 04:11:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 388. [2022-11-03 04:11:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.3617571059431524) internal successors, (527), 387 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 04:11:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 527 transitions. [2022-11-03 04:11:37,888 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 527 transitions. Word has length 163 [2022-11-03 04:11:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:37,888 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 527 transitions. [2022-11-03 04:11:37,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 527 transitions. [2022-11-03 04:11:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:37,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:37,890 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:37,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:38,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 04:11:38,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:38,305 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash 29934487, now seen corresponding path program 1 times [2022-11-03 04:11:38,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:38,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600448325] [2022-11-03 04:11:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:38,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:38,307 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:38,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:11:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:38,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:38,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:39,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:39,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600448325] [2022-11-03 04:11:39,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600448325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:39,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1308499363] [2022-11-03 04:11:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:39,057 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:39,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:39,058 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 04:11:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:11:39,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:39,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1308499363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:39,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:39,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:11:39,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560005570] [2022-11-03 04:11:39,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:39,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:39,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:11:39,545 INFO L87 Difference]: Start difference. First operand 388 states and 527 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 04:11:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:39,653 INFO L93 Difference]: Finished difference Result 1388 states and 1941 transitions. [2022-11-03 04:11:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:39,658 INFO L225 Difference]: With dead ends: 1388 [2022-11-03 04:11:39,658 INFO L226 Difference]: Without dead ends: 1080 [2022-11-03 04:11:39,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:11:39,660 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 376 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:39,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 869 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-03 04:11:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 472. [2022-11-03 04:11:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.3694267515923566) internal successors, (645), 471 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 04:11:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 645 transitions. [2022-11-03 04:11:39,675 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 645 transitions. Word has length 163 [2022-11-03 04:11:39,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:39,676 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 645 transitions. [2022-11-03 04:11:39,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 04:11:39,676 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 645 transitions. [2022-11-03 04:11:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:39,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:39,678 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:39,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:39,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 04:11:40,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:40,093 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 616740501, now seen corresponding path program 1 times [2022-11-03 04:11:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:40,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881233772] [2022-11-03 04:11:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:40,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:40,095 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:40,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 04:11:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:40,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:40,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:40,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:40,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881233772] [2022-11-03 04:11:40,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881233772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:40,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118662022] [2022-11-03 04:11:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:40,803 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:40,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 04:11:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:41,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:41,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [118662022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:41,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991092436] [2022-11-03 04:11:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:41,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:41,751 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:41,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 04:11:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:11:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:11:42,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:11:42,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991092436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:42,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:11:42,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2022-11-03 04:11:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212171958] [2022-11-03 04:11:42,453 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:11:42,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 04:11:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 04:11:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:11:42,457 INFO L87 Difference]: Start difference. First operand 472 states and 645 transitions. Second operand has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 04:11:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:44,275 INFO L93 Difference]: Finished difference Result 3766 states and 5264 transitions. [2022-11-03 04:11:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 04:11:44,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:44,285 INFO L225 Difference]: With dead ends: 3766 [2022-11-03 04:11:44,285 INFO L226 Difference]: Without dead ends: 3324 [2022-11-03 04:11:44,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 955 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=847, Invalid=2345, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 04:11:44,291 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 3343 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:44,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 1125 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:11:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2022-11-03 04:11:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 502. [2022-11-03 04:11:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.3552894211576847) internal successors, (679), 501 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 04:11:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 679 transitions. [2022-11-03 04:11:44,326 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 679 transitions. Word has length 163 [2022-11-03 04:11:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:44,327 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 679 transitions. [2022-11-03 04:11:44,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 04:11:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 679 transitions. [2022-11-03 04:11:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:44,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:44,329 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:44,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:44,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 04:11:44,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:44,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:44,934 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1500221671, now seen corresponding path program 1 times [2022-11-03 04:11:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:44,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063566197] [2022-11-03 04:11:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:44,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:44,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:44,937 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:44,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 04:11:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:45,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:45,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:45,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063566197] [2022-11-03 04:11:45,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063566197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:45,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928376302] [2022-11-03 04:11:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:45,769 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:45,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:45,770 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:45,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 04:11:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:11:46,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:46,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1928376302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:46,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:46,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 04:11:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147014037] [2022-11-03 04:11:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:46,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:11:46,254 INFO L87 Difference]: Start difference. First operand 502 states and 679 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:46,341 INFO L93 Difference]: Finished difference Result 1318 states and 1825 transitions. [2022-11-03 04:11:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:11:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:46,346 INFO L225 Difference]: With dead ends: 1318 [2022-11-03 04:11:46,346 INFO L226 Difference]: Without dead ends: 1106 [2022-11-03 04:11:46,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:11:46,348 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 549 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:46,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 473 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-03 04:11:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 534. [2022-11-03 04:11:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.3564727954971858) internal successors, (723), 533 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 04:11:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 723 transitions. [2022-11-03 04:11:46,366 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 723 transitions. Word has length 163 [2022-11-03 04:11:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:46,366 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 723 transitions. [2022-11-03 04:11:46,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 723 transitions. [2022-11-03 04:11:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:46,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:46,368 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:46,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:46,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:46,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:46,771 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash 34413847, now seen corresponding path program 1 times [2022-11-03 04:11:46,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:46,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376109501] [2022-11-03 04:11:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:46,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:46,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:46,773 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:46,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 04:11:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:47,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:47,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376109501] [2022-11-03 04:11:47,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376109501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1626811270] [2022-11-03 04:11:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:47,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:47,621 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:47,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 04:11:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 04:11:48,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:48,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1626811270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:48,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:48,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 04:11:48,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347635966] [2022-11-03 04:11:48,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:48,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:48,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:11:48,108 INFO L87 Difference]: Start difference. First operand 534 states and 723 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:11:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:48,197 INFO L93 Difference]: Finished difference Result 1926 states and 2667 transitions. [2022-11-03 04:11:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 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 163 [2022-11-03 04:11:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:48,201 INFO L225 Difference]: With dead ends: 1926 [2022-11-03 04:11:48,202 INFO L226 Difference]: Without dead ends: 1472 [2022-11-03 04:11:48,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:11:48,203 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 465 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:48,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 506 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:11:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2022-11-03 04:11:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 750. [2022-11-03 04:11:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.363150867823765) internal successors, (1021), 749 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 04:11:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1021 transitions. [2022-11-03 04:11:48,223 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1021 transitions. Word has length 163 [2022-11-03 04:11:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:48,223 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1021 transitions. [2022-11-03 04:11:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:11:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1021 transitions. [2022-11-03 04:11:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:11:48,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:48,226 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:48,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:48,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 04:11:48,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:48,629 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1771024487, now seen corresponding path program 1 times [2022-11-03 04:11:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:48,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751561456] [2022-11-03 04:11:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:48,632 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:48,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 04:11:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:49,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:49,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751561456] [2022-11-03 04:11:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751561456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2056052351] [2022-11-03 04:11:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:49,467 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:49,468 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:49,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 04:11:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:49,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:50,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:50,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2056052351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:50,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178793145] [2022-11-03 04:11:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:50,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:50,312 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:50,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 04:11:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:11:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 35 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:50,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:51,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178793145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:51,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:11:51,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 11, 11] total 34 [2022-11-03 04:11:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416314510] [2022-11-03 04:11:51,301 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:11:51,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:11:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:11:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:11:51,304 INFO L87 Difference]: Start difference. First operand 750 states and 1021 transitions. Second operand has 34 states, 34 states have (on average 10.558823529411764) internal successors, (359), 34 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 04:12:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:01,058 INFO L93 Difference]: Finished difference Result 11140 states and 15436 transitions. [2022-11-03 04:12:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-11-03 04:12:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 10.558823529411764) internal successors, (359), 34 states have internal predecessors, (359), 0 states have call successors, (0), 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 163 [2022-11-03 04:12:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:01,086 INFO L225 Difference]: With dead ends: 11140 [2022-11-03 04:12:01,087 INFO L226 Difference]: Without dead ends: 10470 [2022-11-03 04:12:01,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 940 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22704 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9236, Invalid=45754, Unknown=0, NotChecked=0, Total=54990 [2022-11-03 04:12:01,101 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 11383 mSDsluCounter, 6791 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11383 SdHoareTripleChecker+Valid, 6944 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:01,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11383 Valid, 6944 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 04:12:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10470 states. [2022-11-03 04:12:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10470 to 1602. [2022-11-03 04:12:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 1.3603997501561524) internal successors, (2178), 1601 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states 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 04:12:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2178 transitions. [2022-11-03 04:12:01,234 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2178 transitions. Word has length 163 [2022-11-03 04:12:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:01,234 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2178 transitions. [2022-11-03 04:12:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.558823529411764) internal successors, (359), 34 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 04:12:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2178 transitions. [2022-11-03 04:12:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:01,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:01,237 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:01,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 04:12:01,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:01,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-03 04:12:01,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:01,852 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:01,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1414186527, now seen corresponding path program 1 times [2022-11-03 04:12:01,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:01,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533906342] [2022-11-03 04:12:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:01,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:01,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:01,854 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:01,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:12:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:12:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:02,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:02,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533906342] [2022-11-03 04:12:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533906342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343559127] [2022-11-03 04:12:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:02,680 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:02,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 04:12:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:03,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:12:03,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:03,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343559127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:03,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:03,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 04:12:03,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524954663] [2022-11-03 04:12:03,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:03,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:12:03,092 INFO L87 Difference]: Start difference. First operand 1602 states and 2178 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 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 04:12:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:03,218 INFO L93 Difference]: Finished difference Result 4566 states and 6260 transitions. [2022-11-03 04:12:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:03,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 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 163 [2022-11-03 04:12:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:03,235 INFO L225 Difference]: With dead ends: 4566 [2022-11-03 04:12:03,235 INFO L226 Difference]: Without dead ends: 3084 [2022-11-03 04:12:03,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:12:03,237 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 523 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:03,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 483 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:12:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-11-03 04:12:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1618. [2022-11-03 04:12:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 1.3518862090290662) internal successors, (2186), 1617 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states 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 04:12:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2186 transitions. [2022-11-03 04:12:03,278 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2186 transitions. Word has length 163 [2022-11-03 04:12:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:03,278 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 2186 transitions. [2022-11-03 04:12:03,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 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 04:12:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2186 transitions. [2022-11-03 04:12:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:03,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:03,281 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:03,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 04:12:03,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 04:12:03,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:03,685 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash 921560353, now seen corresponding path program 1 times [2022-11-03 04:12:03,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:03,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460222846] [2022-11-03 04:12:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:03,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:03,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:03,687 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:03,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 04:12:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:04,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:04,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:04,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460222846] [2022-11-03 04:12:04,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460222846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:04,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322789258] [2022-11-03 04:12:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:04,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:04,387 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:04,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 04:12:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:12:04,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:04,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322789258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:04,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:04,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:12:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968360364] [2022-11-03 04:12:04,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:04,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:04,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:04,857 INFO L87 Difference]: Start difference. First operand 1618 states and 2186 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:04,976 INFO L93 Difference]: Finished difference Result 3926 states and 5348 transitions. [2022-11-03 04:12:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:12:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:04,980 INFO L225 Difference]: With dead ends: 3926 [2022-11-03 04:12:04,981 INFO L226 Difference]: Without dead ends: 2428 [2022-11-03 04:12:04,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:12:04,982 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 350 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:04,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 528 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-11-03 04:12:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1650. [2022-11-03 04:12:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 1.3353547604608853) internal successors, (2202), 1649 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states 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 04:12:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2202 transitions. [2022-11-03 04:12:05,026 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2202 transitions. Word has length 163 [2022-11-03 04:12:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:05,027 INFO L495 AbstractCegarLoop]: Abstraction has 1650 states and 2202 transitions. [2022-11-03 04:12:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2202 transitions. [2022-11-03 04:12:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:05,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:05,029 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:05,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:05,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-03 04:12:05,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:05,444 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1987203549, now seen corresponding path program 1 times [2022-11-03 04:12:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:05,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100164816] [2022-11-03 04:12:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:05,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:05,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:05,446 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:05,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:12:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:05,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:06,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100164816] [2022-11-03 04:12:06,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100164816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772159938] [2022-11-03 04:12:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:06,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:06,158 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:06,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 04:12:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:12:06,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:06,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772159938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:06,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:06,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:12:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282014355] [2022-11-03 04:12:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:06,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:06,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:06,638 INFO L87 Difference]: Start difference. First operand 1650 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:06,775 INFO L93 Difference]: Finished difference Result 4062 states and 5472 transitions. [2022-11-03 04:12:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:06,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:12:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:06,779 INFO L225 Difference]: With dead ends: 4062 [2022-11-03 04:12:06,779 INFO L226 Difference]: Without dead ends: 2532 [2022-11-03 04:12:06,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:12:06,782 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 354 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:06,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 527 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-11-03 04:12:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1730. [2022-11-03 04:12:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 1.3314054366685946) internal successors, (2302), 1729 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states 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 04:12:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2302 transitions. [2022-11-03 04:12:06,833 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2302 transitions. Word has length 163 [2022-11-03 04:12:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:06,833 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2302 transitions. [2022-11-03 04:12:06,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2302 transitions. [2022-11-03 04:12:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:06,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:06,836 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:06,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:07,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 04:12:07,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:07,251 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash 618820005, now seen corresponding path program 1 times [2022-11-03 04:12:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:07,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153170106] [2022-11-03 04:12:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:07,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:07,253 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 04:12:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:07,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153170106] [2022-11-03 04:12:07,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153170106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301363946] [2022-11-03 04:12:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:07,943 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:07,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 04:12:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:08,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:08,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:12:08,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:08,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1301363946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:08,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:08,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:12:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133654795] [2022-11-03 04:12:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:08,416 INFO L87 Difference]: Start difference. First operand 1730 states and 2302 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:08,538 INFO L93 Difference]: Finished difference Result 4150 states and 5572 transitions. [2022-11-03 04:12:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:12:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:08,542 INFO L225 Difference]: With dead ends: 4150 [2022-11-03 04:12:08,542 INFO L226 Difference]: Without dead ends: 2540 [2022-11-03 04:12:08,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:12:08,544 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 352 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:08,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 526 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-03 04:12:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1738. [2022-11-03 04:12:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 1.3275762809441567) internal successors, (2306), 1737 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states 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 04:12:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2306 transitions. [2022-11-03 04:12:08,586 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2306 transitions. Word has length 163 [2022-11-03 04:12:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:08,586 INFO L495 AbstractCegarLoop]: Abstraction has 1738 states and 2306 transitions. [2022-11-03 04:12:08,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2306 transitions. [2022-11-03 04:12:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:08,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:08,589 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:08,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:08,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:09,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:09,004 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash -969527897, now seen corresponding path program 1 times [2022-11-03 04:12:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:09,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027736481] [2022-11-03 04:12:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:09,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:09,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:09,007 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:09,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 04:12:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:09,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:09,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027736481] [2022-11-03 04:12:09,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027736481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:09,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1704029045] [2022-11-03 04:12:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:09,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:09,699 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-03 04:12:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:10,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:12:10,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:10,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1704029045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:10,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:10,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:12:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992632602] [2022-11-03 04:12:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:10,160 INFO L87 Difference]: Start difference. First operand 1738 states and 2306 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:10,307 INFO L93 Difference]: Finished difference Result 4182 states and 5600 transitions. [2022-11-03 04:12:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:10,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:12:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:10,310 INFO L225 Difference]: With dead ends: 4182 [2022-11-03 04:12:10,310 INFO L226 Difference]: Without dead ends: 2564 [2022-11-03 04:12:10,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:12:10,312 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 352 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:10,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 525 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-11-03 04:12:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1758. [2022-11-03 04:12:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 1.3261240751280592) internal successors, (2330), 1757 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states 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 04:12:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2330 transitions. [2022-11-03 04:12:10,354 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2330 transitions. Word has length 163 [2022-11-03 04:12:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:10,354 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 2330 transitions. [2022-11-03 04:12:10,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2330 transitions. [2022-11-03 04:12:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:10,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:10,357 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:10,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:10,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:10,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:10,761 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash -268463319, now seen corresponding path program 1 times [2022-11-03 04:12:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:10,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112436820] [2022-11-03 04:12:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:10,762 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 04:12:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:11,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:11,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112436820] [2022-11-03 04:12:11,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112436820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279079038] [2022-11-03 04:12:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:11,440 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:11,441 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:11,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 04:12:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:11,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:12:11,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:11,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279079038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:11,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:11,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:12:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824642843] [2022-11-03 04:12:11,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:11,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:11,895 INFO L87 Difference]: Start difference. First operand 1758 states and 2330 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:12,046 INFO L93 Difference]: Finished difference Result 4210 states and 5630 transitions. [2022-11-03 04:12:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:12:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:12,052 INFO L225 Difference]: With dead ends: 4210 [2022-11-03 04:12:12,053 INFO L226 Difference]: Without dead ends: 2572 [2022-11-03 04:12:12,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:12:12,057 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 351 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:12,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 524 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-11-03 04:12:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1766. [2022-11-03 04:12:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 1.3246458923512747) internal successors, (2338), 1765 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 04:12:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2338 transitions. [2022-11-03 04:12:12,096 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2338 transitions. Word has length 163 [2022-11-03 04:12:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:12,096 INFO L495 AbstractCegarLoop]: Abstraction has 1766 states and 2338 transitions. [2022-11-03 04:12:12,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2338 transitions. [2022-11-03 04:12:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:12,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:12,101 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:12,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:12,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:12,516 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1506544043, now seen corresponding path program 1 times [2022-11-03 04:12:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:12,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124060019] [2022-11-03 04:12:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:12,518 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:12,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 04:12:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:12,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:13,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:13,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:13,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124060019] [2022-11-03 04:12:13,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124060019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [386991989] [2022-11-03 04:12:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:13,190 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 04:12:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:12:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:12:13,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:13,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [386991989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:13,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:13,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 04:12:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109726095] [2022-11-03 04:12:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:13,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:12:13,644 INFO L87 Difference]: Start difference. First operand 1766 states and 2338 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:13,759 INFO L93 Difference]: Finished difference Result 4050 states and 5406 transitions. [2022-11-03 04:12:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:12:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-03 04:12:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:13,764 INFO L225 Difference]: With dead ends: 4050 [2022-11-03 04:12:13,764 INFO L226 Difference]: Without dead ends: 2404 [2022-11-03 04:12:13,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:12:13,768 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 347 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:13,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 523 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-11-03 04:12:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1672. [2022-11-03 04:12:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.322561340514662) internal successors, (2210), 1671 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:12:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2210 transitions. [2022-11-03 04:12:13,840 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2210 transitions. Word has length 163 [2022-11-03 04:12:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:13,840 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 2210 transitions. [2022-11-03 04:12:13,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2210 transitions. [2022-11-03 04:12:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:12:13,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:13,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:13,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:14,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-03 04:12:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:14,264 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1508391085, now seen corresponding path program 1 times [2022-11-03 04:12:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:14,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924119791] [2022-11-03 04:12:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:14,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:14,267 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:14,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 04:12:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:14,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:14,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:14,994 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924119791] [2022-11-03 04:12:14,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924119791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612421795] [2022-11-03 04:12:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:14,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:14,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:14,996 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:14,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 04:12:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:15,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:15,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612421795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36823036] [2022-11-03 04:12:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:15,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:15,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:15,891 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:15,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 04:12:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:12:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:16,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:17,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36823036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:17,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:17,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2022-11-03 04:12:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889253200] [2022-11-03 04:12:17,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:17,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:12:17,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:12:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:12:17,010 INFO L87 Difference]: Start difference. First operand 1672 states and 2210 transitions. Second operand has 22 states, 22 states have (on average 21.272727272727273) internal successors, (468), 22 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 04:12:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:18,363 INFO L93 Difference]: Finished difference Result 11108 states and 14852 transitions. [2022-11-03 04:12:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 04:12:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 21.272727272727273) internal successors, (468), 22 states have internal predecessors, (468), 0 states have call successors, (0), 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 163 [2022-11-03 04:12:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:18,373 INFO L225 Difference]: With dead ends: 11108 [2022-11-03 04:12:18,373 INFO L226 Difference]: Without dead ends: 9548 [2022-11-03 04:12:18,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:12:18,380 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 4675 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4675 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:18,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4675 Valid, 2168 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:12:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9548 states. [2022-11-03 04:12:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9548 to 2998. [2022-11-03 04:12:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 1.31664998331665) internal successors, (3946), 2997 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states 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 04:12:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3946 transitions. [2022-11-03 04:12:18,471 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3946 transitions. Word has length 163 [2022-11-03 04:12:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:18,471 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 3946 transitions. [2022-11-03 04:12:18,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 21.272727272727273) internal successors, (468), 22 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 04:12:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3946 transitions. [2022-11-03 04:12:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-03 04:12:18,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:18,475 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:18,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:18,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:18,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-03 04:12:19,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:19,090 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:19,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:19,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1555825707, now seen corresponding path program 1 times [2022-11-03 04:12:19,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:19,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293572331] [2022-11-03 04:12:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:19,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:19,092 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:19,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 04:12:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:19,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:12:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 04:12:19,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 04:12:19,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293572331] [2022-11-03 04:12:19,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293572331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547856712] [2022-11-03 04:12:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:19,931 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:19,932 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:19,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 04:12:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:12:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 04:12:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 04:12:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1547856712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251195252] [2022-11-03 04:12:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:20,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:20,944 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:20,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 04:12:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:21,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:12:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 04:12:21,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 04:12:21,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251195252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:21,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:21,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 6, 6] total 22 [2022-11-03 04:12:21,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481045579] [2022-11-03 04:12:21,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:21,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:12:21,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:21,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:12:21,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:12:21,562 INFO L87 Difference]: Start difference. First operand 2998 states and 3946 transitions. Second operand has 22 states, 22 states have (on average 13.5) internal successors, (297), 22 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:24,179 INFO L93 Difference]: Finished difference Result 17866 states and 23419 transitions. [2022-11-03 04:12:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 04:12:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 13.5) internal successors, (297), 22 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-03 04:12:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:24,190 INFO L225 Difference]: With dead ends: 17866 [2022-11-03 04:12:24,190 INFO L226 Difference]: Without dead ends: 14874 [2022-11-03 04:12:24,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1424 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1343, Invalid=4207, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 04:12:24,195 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 4212 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4212 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:24,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4212 Valid, 1820 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:12:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2022-11-03 04:12:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 5094. [2022-11-03 04:12:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 1.3092479874337326) internal successors, (6668), 5093 states have internal predecessors, (6668), 0 states have call successors, (0), 0 states 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 04:12:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 6668 transitions. [2022-11-03 04:12:24,378 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 6668 transitions. Word has length 242 [2022-11-03 04:12:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:24,379 INFO L495 AbstractCegarLoop]: Abstraction has 5094 states and 6668 transitions. [2022-11-03 04:12:24,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.5) internal successors, (297), 22 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 6668 transitions. [2022-11-03 04:12:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-03 04:12:24,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:24,385 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 04:12:24,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:24,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 04:12:24,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-03 04:12:24,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:24,991 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1360322581, now seen corresponding path program 1 times [2022-11-03 04:12:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235365157] [2022-11-03 04:12:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:24,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:24,994 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:24,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 04:12:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:12:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-03 04:12:25,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:12:25,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235365157] [2022-11-03 04:12:25,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235365157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:12:25,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:12:25,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:12:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944806685] [2022-11-03 04:12:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:12:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:12:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:12:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:12:25,437 INFO L87 Difference]: Start difference. First operand 5094 states and 6668 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:12:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:25,589 INFO L93 Difference]: Finished difference Result 10090 states and 13239 transitions. [2022-11-03 04:12:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:12:25,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 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 242 [2022-11-03 04:12:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:25,592 INFO L225 Difference]: With dead ends: 10090 [2022-11-03 04:12:25,592 INFO L226 Difference]: Without dead ends: 5108 [2022-11-03 04:12:25,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:12:25,596 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 234 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:25,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 465 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:12:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2022-11-03 04:12:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 5018. [2022-11-03 04:12:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 1.3123380506278652) internal successors, (6584), 5017 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states 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 04:12:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 6584 transitions. [2022-11-03 04:12:25,694 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 6584 transitions. Word has length 242 [2022-11-03 04:12:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:25,695 INFO L495 AbstractCegarLoop]: Abstraction has 5018 states and 6584 transitions. [2022-11-03 04:12:25,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 04:12:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 6584 transitions. [2022-11-03 04:12:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-03 04:12:25,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:25,701 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 04:12:25,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:25,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:12:25,917 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash -967824907, now seen corresponding path program 1 times [2022-11-03 04:12:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:25,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521943283] [2022-11-03 04:12:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:25,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:25,920 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:25,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 04:12:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 267 proven. 26 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-03 04:12:26,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 292 proven. 1 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-03 04:12:26,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:26,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521943283] [2022-11-03 04:12:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521943283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:26,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1199245495] [2022-11-03 04:12:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:26,832 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:26,833 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:26,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 04:12:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:27,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 267 proven. 26 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-03 04:12:27,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 292 proven. 1 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-03 04:12:28,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1199245495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:28,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469814891] [2022-11-03 04:12:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:28,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:28,106 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:28,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-03 04:12:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:28,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:12:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 340 proven. 6 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-03 04:12:28,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 288 proven. 62 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 04:12:29,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469814891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:29,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:29,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 8] total 19 [2022-11-03 04:12:29,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738709241] [2022-11-03 04:12:29,135 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:29,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:12:29,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:12:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:12:29,136 INFO L87 Difference]: Start difference. First operand 5018 states and 6584 transitions. Second operand has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 04:12:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:32,257 INFO L93 Difference]: Finished difference Result 34995 states and 45414 transitions. [2022-11-03 04:12:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-03 04:12:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 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 321 [2022-11-03 04:12:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:32,274 INFO L225 Difference]: With dead ends: 34995 [2022-11-03 04:12:32,275 INFO L226 Difference]: Without dead ends: 30089 [2022-11-03 04:12:32,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1975 GetRequests, 1902 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1227, Invalid=4175, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 04:12:32,281 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 2054 mSDsluCounter, 7316 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2054 SdHoareTripleChecker+Valid, 8309 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:32,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2054 Valid, 8309 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:12:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30089 states. [2022-11-03 04:12:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30089 to 8514. [2022-11-03 04:12:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 1.2956654528368379) internal successors, (11030), 8513 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states 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 04:12:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 11030 transitions. [2022-11-03 04:12:32,621 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 11030 transitions. Word has length 321 [2022-11-03 04:12:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:32,622 INFO L495 AbstractCegarLoop]: Abstraction has 8514 states and 11030 transitions. [2022-11-03 04:12:32,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 04:12:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 11030 transitions. [2022-11-03 04:12:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-03 04:12:32,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:32,631 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:32,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:32,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:33,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:33,246 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:33,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1554430923, now seen corresponding path program 2 times [2022-11-03 04:12:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:33,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099750871] [2022-11-03 04:12:33,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:12:33,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:33,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:33,248 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:33,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 04:12:33,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:12:33,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:12:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 273 proven. 32 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-03 04:12:33,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-03 04:12:34,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:34,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099750871] [2022-11-03 04:12:34,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099750871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:34,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [33037093] [2022-11-03 04:12:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:12:34,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:34,138 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:34,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 04:12:34,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:12:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:12:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:12:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 273 proven. 32 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-03 04:12:35,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-03 04:12:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [33037093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058804655] [2022-11-03 04:12:35,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:12:35,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:35,470 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:35,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-03 04:12:35,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:12:35,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:12:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:12:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 346 proven. 6 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-03 04:12:36,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 282 proven. 74 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 04:12:36,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058804655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:36,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:36,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 8] total 19 [2022-11-03 04:12:36,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340271703] [2022-11-03 04:12:36,568 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:36,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:12:36,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:12:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:12:36,570 INFO L87 Difference]: Start difference. First operand 8514 states and 11030 transitions. Second operand has 19 states, 19 states have (on average 22.42105263157895) internal successors, (426), 19 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 04:12:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:39,219 INFO L93 Difference]: Finished difference Result 47008 states and 60672 transitions. [2022-11-03 04:12:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 04:12:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 22.42105263157895) internal successors, (426), 19 states have internal predecessors, (426), 0 states have call successors, (0), 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 321 [2022-11-03 04:12:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:39,250 INFO L225 Difference]: With dead ends: 47008 [2022-11-03 04:12:39,250 INFO L226 Difference]: Without dead ends: 38606 [2022-11-03 04:12:39,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1977 GetRequests, 1902 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1291, Invalid=4409, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:12:39,261 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 3380 mSDsluCounter, 3373 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3380 SdHoareTripleChecker+Valid, 3808 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:39,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3380 Valid, 3808 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:12:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38606 states. [2022-11-03 04:12:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38606 to 9642. [2022-11-03 04:12:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9642 states, 9641 states have (on average 1.284099159838191) internal successors, (12380), 9641 states have internal predecessors, (12380), 0 states have call successors, (0), 0 states 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 04:12:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9642 states to 9642 states and 12380 transitions. [2022-11-03 04:12:39,666 INFO L78 Accepts]: Start accepts. Automaton has 9642 states and 12380 transitions. Word has length 321 [2022-11-03 04:12:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:39,667 INFO L495 AbstractCegarLoop]: Abstraction has 9642 states and 12380 transitions. [2022-11-03 04:12:39,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.42105263157895) internal successors, (426), 19 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 04:12:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 9642 states and 12380 transitions. [2022-11-03 04:12:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-03 04:12:39,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:39,676 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 04:12:39,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:39,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:40,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 04:12:40,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:40,291 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 974705141, now seen corresponding path program 1 times [2022-11-03 04:12:40,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689881567] [2022-11-03 04:12:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:40,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:40,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:40,294 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:40,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 04:12:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:12:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 275 proven. 34 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-03 04:12:41,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 275 proven. 34 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-03 04:12:41,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:41,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689881567] [2022-11-03 04:12:41,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689881567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:41,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422660062] [2022-11-03 04:12:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:41,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:41,644 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:41,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 04:12:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:12:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 298 proven. 104 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 04:12:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 298 proven. 104 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 04:12:43,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422660062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:43,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768525369] [2022-11-03 04:12:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:43,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:43,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:43,479 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:43,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-03 04:12:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:12:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 155 proven. 198 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-03 04:12:44,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 155 proven. 198 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-03 04:12:45,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768525369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:45,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:45,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8, 8, 12, 12] total 52 [2022-11-03 04:12:45,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851566026] [2022-11-03 04:12:45,826 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:45,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 04:12:45,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:45,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 04:12:45,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2499, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 04:12:45,828 INFO L87 Difference]: Start difference. First operand 9642 states and 12380 transitions. Second operand has 52 states, 52 states have (on average 17.03846153846154) internal successors, (886), 52 states have internal predecessors, (886), 0 states have call successors, (0), 0 states 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 04:14:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:06,132 INFO L93 Difference]: Finished difference Result 133923 states and 172538 transitions. [2022-11-03 04:14:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1004 states. [2022-11-03 04:14:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 17.03846153846154) internal successors, (886), 52 states have internal predecessors, (886), 0 states have call successors, (0), 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 321 [2022-11-03 04:14:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:06,225 INFO L225 Difference]: With dead ends: 133923 [2022-11-03 04:14:06,225 INFO L226 Difference]: Without dead ends: 123757 [2022-11-03 04:14:06,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2922 GetRequests, 1870 SyntacticMatches, 0 SemanticMatches, 1052 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509978 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=61607, Invalid=1048255, Unknown=0, NotChecked=0, Total=1109862 [2022-11-03 04:14:06,298 INFO L413 NwaCegarLoop]: 1121 mSDtfsCounter, 54253 mSDsluCounter, 27529 mSDsCounter, 0 mSdLazyCounter, 9677 mSolverCounterSat, 3876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54253 SdHoareTripleChecker+Valid, 28650 SdHoareTripleChecker+Invalid, 13553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3876 IncrementalHoareTripleChecker+Valid, 9677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:06,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54253 Valid, 28650 Invalid, 13553 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3876 Valid, 9677 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-03 04:14:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123757 states. [2022-11-03 04:14:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123757 to 15484. [2022-11-03 04:14:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15484 states, 15483 states have (on average 1.2710714977717497) internal successors, (19680), 15483 states have internal predecessors, (19680), 0 states have call successors, (0), 0 states 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 04:14:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15484 states to 15484 states and 19680 transitions. [2022-11-03 04:14:07,339 INFO L78 Accepts]: Start accepts. Automaton has 15484 states and 19680 transitions. Word has length 321 [2022-11-03 04:14:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:07,339 INFO L495 AbstractCegarLoop]: Abstraction has 15484 states and 19680 transitions. [2022-11-03 04:14:07,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 17.03846153846154) internal successors, (886), 52 states have internal predecessors, (886), 0 states have call successors, (0), 0 states 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 04:14:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15484 states and 19680 transitions. [2022-11-03 04:14:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-11-03 04:14:07,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:07,353 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:07,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-11-03 04:14:07,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 04:14:07,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:07,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:07,960 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash -26808277, now seen corresponding path program 1 times [2022-11-03 04:14:07,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:07,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561374943] [2022-11-03 04:14:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:07,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:07,962 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:07,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 04:14:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:14:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 376 proven. 28 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-03 04:14:08,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 376 proven. 28 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-03 04:14:09,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:09,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561374943] [2022-11-03 04:14:09,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561374943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:09,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [805594526] [2022-11-03 04:14:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:09,291 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:09,292 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:09,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 04:14:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:14:10,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-03 04:14:10,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:10,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [805594526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:10,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:14:10,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 04:14:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768186262] [2022-11-03 04:14:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:10,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:14:10,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:14:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 04:14:10,163 INFO L87 Difference]: Start difference. First operand 15484 states and 19680 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 04:14:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:10,562 INFO L93 Difference]: Finished difference Result 29918 states and 37949 transitions. [2022-11-03 04:14:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:14:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 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 400 [2022-11-03 04:14:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:10,571 INFO L225 Difference]: With dead ends: 29918 [2022-11-03 04:14:10,572 INFO L226 Difference]: Without dead ends: 20236 [2022-11-03 04:14:10,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1203 GetRequests, 1175 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 04:14:10,576 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 377 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:10,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 573 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:14:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20236 states. [2022-11-03 04:14:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20236 to 15484. [2022-11-03 04:14:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15484 states, 15483 states have (on average 1.2613834528192212) internal successors, (19530), 15483 states have internal predecessors, (19530), 0 states have call successors, (0), 0 states 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 04:14:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15484 states to 15484 states and 19530 transitions. [2022-11-03 04:14:10,885 INFO L78 Accepts]: Start accepts. Automaton has 15484 states and 19530 transitions. Word has length 400 [2022-11-03 04:14:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:10,885 INFO L495 AbstractCegarLoop]: Abstraction has 15484 states and 19530 transitions. [2022-11-03 04:14:10,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 04:14:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15484 states and 19530 transitions. [2022-11-03 04:14:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-11-03 04:14:10,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:10,898 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:10,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:11,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 04:14:11,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:11,303 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1271272623, now seen corresponding path program 2 times [2022-11-03 04:14:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:11,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558613251] [2022-11-03 04:14:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:14:11,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:11,305 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:11,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 04:14:11,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:14:11,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:14:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:14:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 376 proven. 28 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-03 04:14:12,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 376 proven. 28 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-03 04:14:12,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558613251] [2022-11-03 04:14:12,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558613251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [571657285] [2022-11-03 04:14:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:14:12,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:12,732 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:12,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 04:14:13,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:14:13,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:14:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:14:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 380 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 04:14:14,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 380 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 04:14:14,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [571657285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269237135] [2022-11-03 04:14:14,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:14:14,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:14,547 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 04:14:14,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:14:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:14:14,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:14:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 380 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 04:14:15,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 380 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-03 04:14:15,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269237135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:15,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:15,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 13, 12] total 40 [2022-11-03 04:14:15,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434327845] [2022-11-03 04:14:15,484 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 04:14:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 04:14:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:14:15,486 INFO L87 Difference]: Start difference. First operand 15484 states and 19530 transitions. Second operand has 40 states, 40 states have (on average 10.85) internal successors, (434), 40 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 04:14:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:18,745 INFO L93 Difference]: Finished difference Result 47116 states and 59396 transitions. [2022-11-03 04:14:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 04:14:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.85) internal successors, (434), 40 states have internal predecessors, (434), 0 states have call successors, (0), 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 400 [2022-11-03 04:14:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:18,771 INFO L225 Difference]: With dead ends: 47116 [2022-11-03 04:14:18,771 INFO L226 Difference]: Without dead ends: 31744 [2022-11-03 04:14:18,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2429 GetRequests, 2356 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1062, Invalid=4488, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 04:14:18,784 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 3970 mSDsluCounter, 6217 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3970 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:18,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3970 Valid, 6431 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 04:14:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31744 states. [2022-11-03 04:14:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31744 to 14056. [2022-11-03 04:14:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 1.2553539665599431) internal successors, (17644), 14055 states have internal predecessors, (17644), 0 states have call successors, (0), 0 states 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 04:14:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 17644 transitions. [2022-11-03 04:14:19,197 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 17644 transitions. Word has length 400 [2022-11-03 04:14:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:19,198 INFO L495 AbstractCegarLoop]: Abstraction has 14056 states and 17644 transitions. [2022-11-03 04:14:19,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.85) internal successors, (434), 40 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 04:14:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 17644 transitions. [2022-11-03 04:14:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-03 04:14:19,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:19,206 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 04:14:19,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 04:14:19,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-03 04:14:19,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:19,807 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1484722227, now seen corresponding path program 3 times [2022-11-03 04:14:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:19,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718689587] [2022-11-03 04:14:19,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:14:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:19,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:19,810 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:19,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 04:14:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:14:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:14:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:14:20,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 1443 trivial. 0 not checked. [2022-11-03 04:14:20,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:20,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:20,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718689587] [2022-11-03 04:14:20,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718689587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:20,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:20,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:14:20,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717537627] [2022-11-03 04:14:20,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:20,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:14:20,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:20,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:14:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:14:20,208 INFO L87 Difference]: Start difference. First operand 14056 states and 17644 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 04:14:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:20,671 INFO L93 Difference]: Finished difference Result 34558 states and 43679 transitions. [2022-11-03 04:14:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:14:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 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 558 [2022-11-03 04:14:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:20,682 INFO L225 Difference]: With dead ends: 34558 [2022-11-03 04:14:20,682 INFO L226 Difference]: Without dead ends: 20614 [2022-11-03 04:14:20,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:14:20,688 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 387 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:20,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 490 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:14:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20614 states. [2022-11-03 04:14:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20614 to 15608. [2022-11-03 04:14:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15608 states, 15607 states have (on average 1.2491830588838342) internal successors, (19496), 15607 states have internal predecessors, (19496), 0 states have call successors, (0), 0 states 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 04:14:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15608 states to 15608 states and 19496 transitions. [2022-11-03 04:14:21,001 INFO L78 Accepts]: Start accepts. Automaton has 15608 states and 19496 transitions. Word has length 558 [2022-11-03 04:14:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:21,002 INFO L495 AbstractCegarLoop]: Abstraction has 15608 states and 19496 transitions. [2022-11-03 04:14:21,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 04:14:21,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15608 states and 19496 transitions. [2022-11-03 04:14:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-03 04:14:21,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:21,014 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:21,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:21,227 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash 48468851, now seen corresponding path program 1 times [2022-11-03 04:14:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:21,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670781968] [2022-11-03 04:14:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:21,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:21,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:21,230 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:21,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 04:14:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:14:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 662 proven. 3 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-11-03 04:14:22,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 662 proven. 3 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-11-03 04:14:22,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670781968] [2022-11-03 04:14:22,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670781968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1703314911] [2022-11-03 04:14:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:22,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:22,963 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:22,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-03 04:14:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:14:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 848 proven. 73 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2022-11-03 04:14:24,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 918 proven. 3 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2022-11-03 04:14:25,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1703314911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:25,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967075522] [2022-11-03 04:14:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:25,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:25,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:25,399 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:25,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-03 04:14:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:14:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 882 proven. 72 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2022-11-03 04:14:26,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 953 proven. 1 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2022-11-03 04:14:26,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967075522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:26,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:26,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 10, 9] total 28 [2022-11-03 04:14:26,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645881235] [2022-11-03 04:14:26,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 04:14:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:26,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 04:14:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-11-03 04:14:26,490 INFO L87 Difference]: Start difference. First operand 15608 states and 19496 transitions. Second operand has 28 states, 28 states have (on average 23.25) internal successors, (651), 28 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 04:14:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:27,477 INFO L93 Difference]: Finished difference Result 16248 states and 20236 transitions. [2022-11-03 04:14:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:14:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 23.25) internal successors, (651), 28 states have internal predecessors, (651), 0 states have call successors, (0), 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 558 [2022-11-03 04:14:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:27,478 INFO L225 Difference]: With dead ends: 16248 [2022-11-03 04:14:27,479 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 04:14:27,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3359 GetRequests, 3319 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:14:27,484 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 1001 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:27,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1116 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:14:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 04:14:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 04:14:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states 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 04:14:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 04:14:27,485 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 558 [2022-11-03 04:14:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:27,485 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 04:14:27,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.25) internal successors, (651), 28 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 04:14:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 04:14:27,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 04:14:27,489 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:14:27,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:27,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:27,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:28,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9ee7d24-88f9-40f5-9ea6-d1dc1c62b0b1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:28,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.