./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.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_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/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_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/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_8156f97f-1e7b-46d2-adda-d54be31fa87b/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 67e059c33a41ae8b9e2c5cf27b32223caaf1b02cd8d48df759d586382f492369 --- 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 01:54:40,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:54:40,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:54:40,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:54:40,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:54:40,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:54:40,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:54:40,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:54:40,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:54:40,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:54:40,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:54:40,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:54:40,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:54:40,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:54:40,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:54:40,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:54:40,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:54:40,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:54:40,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:54:40,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:54:40,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:54:40,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:54:40,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:54:40,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:54:40,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:54:40,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:54:40,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:54:40,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:54:40,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:54:40,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:54:40,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:54:40,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:54:40,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:54:40,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:54:40,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:54:40,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:54:40,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:54:40,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:54:40,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:54:40,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:54:40,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:54:40,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:54:40,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:54:40,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:54:40,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:54:40,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:54:40,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:54:40,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:54:40,933 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:54:40,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:54:40,933 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:54:40,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:54:40,935 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:54:40,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:54:40,935 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:54:40,935 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:54:40,936 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:54:40,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:54:40,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:54:40,937 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:54:40,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:54:40,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:54:40,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:54:40,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:54:40,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:54:40,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:54:40,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:54:40,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:54:40,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:54:40,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:54:40,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:54:40,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:54:40,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:54:40,941 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:54:40,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:54:40,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:54:40,942 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:54:40,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:54:40,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:54:40,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:54:40,943 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e059c33a41ae8b9e2c5cf27b32223caaf1b02cd8d48df759d586382f492369 [2022-11-03 01:54:41,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:54:41,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:54:41,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:54:41,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:54:41,308 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:54:41,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c [2022-11-03 01:54:41,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/74abab0dd/8925874d66754d2f982354b388b8579e/FLAG28647995a [2022-11-03 01:54:41,934 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:54:41,935 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c [2022-11-03 01:54:41,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/74abab0dd/8925874d66754d2f982354b388b8579e/FLAG28647995a [2022-11-03 01:54:42,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/74abab0dd/8925874d66754d2f982354b388b8579e [2022-11-03 01:54:42,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:54:42,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:54:42,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:54:42,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:54:42,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:54:42,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36583207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42, skipping insertion in model container [2022-11-03 01:54:42,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:54:42,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:54:42,609 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c[1107,1120] [2022-11-03 01:54:42,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:54:42,695 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:54:42,706 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c[1107,1120] [2022-11-03 01:54:42,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:54:42,770 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:54:42,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42 WrapperNode [2022-11-03 01:54:42,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:54:42,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:54:42,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:54:42,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:54:42,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,891 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 419 [2022-11-03 01:54:42,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:54:42,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:54:42,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:54:42,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:54:42,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,962 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:54:42,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:54:42,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:54:42,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:54:42,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (1/1) ... [2022-11-03 01:54:42,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:54:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:43,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:54:43,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:54:43,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:54:43,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:54:43,327 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:54:43,342 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:54:43,920 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:54:44,460 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:54:44,461 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:54:44,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:44 BoogieIcfgContainer [2022-11-03 01:54:44,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:54:44,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:54:44,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:54:44,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:54:44,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:54:42" (1/3) ... [2022-11-03 01:54:44,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a15ee6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:54:44, skipping insertion in model container [2022-11-03 01:54:44,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:42" (2/3) ... [2022-11-03 01:54:44,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a15ee6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:54:44, skipping insertion in model container [2022-11-03 01:54:44,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:44" (3/3) ... [2022-11-03 01:54:44,485 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v6.c [2022-11-03 01:54:44,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:54:44,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:54:44,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:54:44,577 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;@81c9c12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:54:44,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:54:44,582 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 01:54:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:54:44,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:44,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:54:44,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 7062294, now seen corresponding path program 1 times [2022-11-03 01:54:44,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:44,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911891871] [2022-11-03 01:54:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:44,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:54:45,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:54:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:54:45,156 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:54:45,158 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:54:45,159 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:54:45,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:54:45,166 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:54:45,169 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:54:45,205 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:54:45,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:54:45 BoogieIcfgContainer [2022-11-03 01:54:45,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:54:45,225 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:54:45,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:54:45,226 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:54:45,227 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:44" (3/4) ... [2022-11-03 01:54:45,230 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:54:45,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:54:45,233 INFO L158 Benchmark]: Toolchain (without parser) took 2970.13ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 76.5MB in the beginning and 52.9MB in the end (delta: 23.6MB). Peak memory consumption was 49.2MB. Max. memory is 16.1GB. [2022-11-03 01:54:45,234 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory was 57.8MB in the beginning and 57.6MB in the end (delta: 142.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:54:45,235 INFO L158 Benchmark]: CACSL2BoogieTranslator took 505.51ms. Allocated memory is still 102.8MB. Free memory was 76.5MB in the beginning and 70.2MB in the end (delta: 6.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 01:54:45,236 INFO L158 Benchmark]: Boogie Procedure Inliner took 125.09ms. Allocated memory is still 102.8MB. Free memory was 70.2MB in the beginning and 64.9MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:54:45,242 INFO L158 Benchmark]: Boogie Preprocessor took 73.75ms. Allocated memory is still 102.8MB. Free memory was 64.9MB in the beginning and 61.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:54:45,242 INFO L158 Benchmark]: RCFGBuilder took 1491.64ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 61.8MB in the beginning and 39.5MB in the end (delta: 22.3MB). Peak memory consumption was 49.6MB. Max. memory is 16.1GB. [2022-11-03 01:54:45,244 INFO L158 Benchmark]: TraceAbstraction took 756.74ms. Allocated memory is still 125.8MB. Free memory was 39.3MB in the beginning and 52.9MB in the end (delta: -13.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:54:45,244 INFO L158 Benchmark]: Witness Printer took 6.68ms. Allocated memory is still 125.8MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:54:45,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory was 57.8MB in the beginning and 57.6MB in the end (delta: 142.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 505.51ms. Allocated memory is still 102.8MB. Free memory was 76.5MB in the beginning and 70.2MB in the end (delta: 6.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 125.09ms. Allocated memory is still 102.8MB. Free memory was 70.2MB in the beginning and 64.9MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.75ms. Allocated memory is still 102.8MB. Free memory was 64.9MB in the beginning and 61.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1491.64ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 61.8MB in the beginning and 39.5MB in the end (delta: 22.3MB). Peak memory consumption was 49.6MB. Max. memory is 16.1GB. * TraceAbstraction took 756.74ms. Allocated memory is still 125.8MB. Free memory was 39.3MB in the beginning and 52.9MB in the end (delta: -13.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.68ms. Allocated memory is still 125.8MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 2.7kB). 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 151, overapproximation of bitwiseAnd at line 116. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 8); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (8 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 1); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (1 - 1); [L31] const SORT_1 var_9 = 0; [L32] const SORT_5 var_22 = 0; [L33] const SORT_5 var_31 = 1; [L34] const SORT_1 var_109 = 1; [L36] SORT_1 input_2; [L37] SORT_1 input_3; [L38] SORT_1 input_4; [L39] SORT_5 input_6; [L40] SORT_5 input_7; [L41] SORT_5 input_8; [L42] SORT_5 input_35; [L43] SORT_5 input_37; [L44] SORT_5 input_39; [L45] SORT_5 input_51; [L47] SORT_1 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L50] SORT_5 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L51] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L52] SORT_5 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L53] SORT_5 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L54] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L55] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L57] SORT_5 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L58] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L59] SORT_5 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L60] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L61] SORT_1 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L62] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L63] SORT_1 state_66 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L64] SORT_1 state_68 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L65] SORT_1 state_70 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L66] SORT_1 state_72 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L68] SORT_1 init_11_arg_1 = var_9; [L69] state_10 = init_11_arg_1 [L70] SORT_1 init_13_arg_1 = var_9; [L71] state_12 = init_13_arg_1 [L72] SORT_1 init_19_arg_1 = var_9; [L73] state_18 = init_19_arg_1 [L74] SORT_5 init_24_arg_1 = var_22; [L75] state_23 = init_24_arg_1 [L76] SORT_1 init_27_arg_1 = var_9; [L77] state_26 = init_27_arg_1 [L78] SORT_5 init_42_arg_1 = var_22; [L79] state_41 = init_42_arg_1 [L80] SORT_5 init_44_arg_1 = var_22; [L81] state_43 = init_44_arg_1 [L82] SORT_1 init_46_arg_1 = var_9; [L83] state_45 = init_46_arg_1 [L84] SORT_1 init_48_arg_1 = var_9; [L85] state_47 = init_48_arg_1 [L86] SORT_1 init_50_arg_1 = var_9; [L87] state_49 = init_50_arg_1 [L88] SORT_5 init_54_arg_1 = var_22; [L89] state_53 = init_54_arg_1 [L90] SORT_1 init_56_arg_1 = var_9; [L91] state_55 = init_56_arg_1 [L92] SORT_5 init_58_arg_1 = var_22; [L93] state_57 = init_58_arg_1 [L94] SORT_1 init_60_arg_1 = var_9; [L95] state_59 = init_60_arg_1 [L96] SORT_1 init_63_arg_1 = var_9; [L97] state_62 = init_63_arg_1 [L98] SORT_1 init_65_arg_1 = var_9; [L99] state_64 = init_65_arg_1 [L100] SORT_1 init_67_arg_1 = var_9; [L101] state_66 = init_67_arg_1 [L102] SORT_1 init_69_arg_1 = var_9; [L103] state_68 = init_69_arg_1 [L104] SORT_1 init_71_arg_1 = var_9; [L105] state_70 = init_71_arg_1 [L106] SORT_1 init_73_arg_1 = var_9; [L107] state_72 = init_73_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_19_arg_1=0, init_24_arg_1=0, init_27_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_67_arg_1=0, init_69_arg_1=0, init_71_arg_1=0, init_73_arg_1=0, mask_SORT_1=255, mask_SORT_5=1, msb_SORT_1=128, msb_SORT_5=1, state_10=0, state_12=0, state_18=0, state_23=0, state_26=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_53=0, state_55=0, state_57=0, state_59=0, state_62=0, state_64=0, state_66=0, state_68=0, state_70=0, state_72=0, var_109=1, var_22=0, var_31=1, var_9=0] [L110] input_2 = __VERIFIER_nondet_uchar() [L111] input_3 = __VERIFIER_nondet_uchar() [L112] input_4 = __VERIFIER_nondet_uchar() [L113] input_6 = __VERIFIER_nondet_uchar() [L114] input_7 = __VERIFIER_nondet_uchar() [L115] input_8 = __VERIFIER_nondet_uchar() [L116] input_8 = input_8 & mask_SORT_5 [L117] input_35 = __VERIFIER_nondet_uchar() [L118] input_37 = __VERIFIER_nondet_uchar() [L119] input_39 = __VERIFIER_nondet_uchar() [L120] input_51 = __VERIFIER_nondet_uchar() [L123] SORT_1 var_16_arg_0 = state_10; [L124] SORT_5 var_16 = var_16_arg_0 >> 0; [L125] var_16 = var_16 & mask_SORT_5 [L126] SORT_1 var_15_arg_0 = state_10; [L127] SORT_1 var_15_arg_1 = state_12; [L128] SORT_1 var_15 = var_15_arg_0 + var_15_arg_1; [L129] SORT_1 var_14_arg_0 = state_10; [L130] SORT_1 var_14_arg_1 = state_12; [L131] SORT_1 var_14 = var_14_arg_0 - var_14_arg_1; [L132] SORT_5 var_17_arg_0 = var_16; [L133] SORT_1 var_17_arg_1 = var_15; [L134] SORT_1 var_17_arg_2 = var_14; [L135] EXPR var_17_arg_0 ? var_17_arg_1 : var_17_arg_2 [L135] SORT_1 var_17 = var_17_arg_0 ? var_17_arg_1 : var_17_arg_2; [L136] SORT_1 var_21_arg_0 = var_17; [L137] SORT_1 var_21_arg_1 = state_18; [L138] SORT_1 var_21 = var_21_arg_0 + var_21_arg_1; [L139] SORT_1 var_20_arg_0 = var_17; [L140] SORT_1 var_20_arg_1 = state_18; [L141] SORT_1 var_20 = var_20_arg_0 - var_20_arg_1; [L142] SORT_5 var_25_arg_0 = state_23; [L143] SORT_1 var_25_arg_1 = var_21; [L144] SORT_1 var_25_arg_2 = var_20; [L145] EXPR var_25_arg_0 ? var_25_arg_1 : var_25_arg_2 [L145] SORT_1 var_25 = var_25_arg_0 ? var_25_arg_1 : var_25_arg_2; [L146] var_25 = var_25 & mask_SORT_1 [L147] SORT_1 var_28_arg_0 = var_25; [L148] SORT_1 var_28_arg_1 = state_26; [L149] SORT_5 var_28 = var_28_arg_0 == var_28_arg_1; [L150] SORT_5 var_32_arg_0 = var_28; [L151] SORT_5 var_32 = ~var_32_arg_0; [L152] SORT_5 var_33_arg_0 = var_31; [L153] SORT_5 var_33_arg_1 = var_32; [L154] SORT_5 var_33 = var_33_arg_0 & var_33_arg_1; [L155] var_33 = var_33 & mask_SORT_5 [L156] SORT_5 bad_34_arg_0 = var_33; [L157] CALL __VERIFIER_assert(!(bad_34_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: 0.6s, 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, 0.3s 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 01:54:45,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/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_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/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_8156f97f-1e7b-46d2-adda-d54be31fa87b/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 67e059c33a41ae8b9e2c5cf27b32223caaf1b02cd8d48df759d586382f492369 --- 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 01:54:47,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:54:47,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:54:47,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:54:47,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:54:47,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:54:47,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:54:47,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:54:47,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:54:47,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:54:47,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:54:47,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:54:47,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:54:47,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:54:47,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:54:47,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:54:47,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:54:47,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:54:47,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:54:47,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:54:47,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:54:47,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:54:47,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:54:47,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:54:47,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:54:47,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:54:47,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:54:47,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:54:47,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:54:47,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:54:47,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:54:47,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:54:47,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:54:47,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:54:47,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:54:47,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:54:47,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:54:47,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:54:47,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:54:47,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:54:47,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:54:47,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:54:47,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:54:47,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:54:47,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:54:47,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:54:47,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:54:47,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:54:47,670 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:54:47,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:54:47,670 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:54:47,670 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:54:47,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:54:47,671 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:54:47,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:54:47,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:54:47,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:54:47,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:54:47,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:54:47,674 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:54:47,674 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:54:47,674 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:54:47,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:54:47,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:54:47,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:54:47,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:54:47,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:54:47,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:54:47,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:54:47,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:54:47,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:54:47,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:54:47,677 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:54:47,677 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:47,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:54:47,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:54:47,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:54:47,678 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e059c33a41ae8b9e2c5cf27b32223caaf1b02cd8d48df759d586382f492369 [2022-11-03 01:54:48,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:54:48,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:54:48,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:54:48,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:54:48,070 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:54:48,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c [2022-11-03 01:54:48,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/d360e6b5f/63b96e7b5055431eb41562016fbe2cd0/FLAGbe50f57b4 [2022-11-03 01:54:48,747 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:54:48,748 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c [2022-11-03 01:54:48,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/d360e6b5f/63b96e7b5055431eb41562016fbe2cd0/FLAGbe50f57b4 [2022-11-03 01:54:49,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/data/d360e6b5f/63b96e7b5055431eb41562016fbe2cd0 [2022-11-03 01:54:49,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:54:49,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:54:49,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:54:49,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:54:49,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:54:49,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9eb5e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49, skipping insertion in model container [2022-11-03 01:54:49,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:54:49,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:54:49,273 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c[1107,1120] [2022-11-03 01:54:49,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:54:49,416 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:54:49,428 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_8156f97f-1e7b-46d2-adda-d54be31fa87b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v6.c[1107,1120] [2022-11-03 01:54:49,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:54:49,517 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:54:49,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49 WrapperNode [2022-11-03 01:54:49,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:54:49,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:54:49,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:54:49,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:54:49,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,604 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 419 [2022-11-03 01:54:49,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:54:49,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:54:49,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:54:49,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:54:49,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,670 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:54:49,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:54:49,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:54:49,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:54:49,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (1/1) ... [2022-11-03 01:54:49,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:54:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:49,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:54:49,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:54:49,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:54:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:54:49,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:54:49,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:54:50,565 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:54:50,586 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:54:50,587 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:54:50,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:50 BoogieIcfgContainer [2022-11-03 01:54:50,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:54:50,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:54:50,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:54:50,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:54:50,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:54:49" (1/3) ... [2022-11-03 01:54:50,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1750eb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:54:50, skipping insertion in model container [2022-11-03 01:54:50,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:54:49" (2/3) ... [2022-11-03 01:54:50,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1750eb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:54:50, skipping insertion in model container [2022-11-03 01:54:50,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:50" (3/3) ... [2022-11-03 01:54:50,604 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v6.c [2022-11-03 01:54:50,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:54:50,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:54:50,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:54:50,727 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;@7b4df8bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:54:50,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:54:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 58 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 01:54:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:54:50,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:50,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:50,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 01:54:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:50,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222575116] [2022-11-03 01:54:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:50,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:50,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:54:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:51,100 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 01:54:51,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:51,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:51,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222575116] [2022-11-03 01:54:51,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222575116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:51,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:51,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:51,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677265767] [2022-11-03 01:54:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:51,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:51,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:51,150 INFO L87 Difference]: Start difference. First operand has 59 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 58 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:51,294 INFO L93 Difference]: Finished difference Result 217 states and 323 transitions. [2022-11-03 01:54:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:54:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:51,310 INFO L225 Difference]: With dead ends: 217 [2022-11-03 01:54:51,311 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 01:54:51,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:51,318 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 224 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:51,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 293 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 01:54:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 57. [2022-11-03 01:54:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 81 transitions. [2022-11-03 01:54:51,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 81 transitions. Word has length 9 [2022-11-03 01:54:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:51,384 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 81 transitions. [2022-11-03 01:54:51,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 81 transitions. [2022-11-03 01:54:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:54:51,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:51,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:51,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:51,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:51,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 01:54:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:51,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805290687] [2022-11-03 01:54:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:51,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:51,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:54:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:54:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:51,767 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 01:54:51,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:51,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805290687] [2022-11-03 01:54:51,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805290687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:51,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:51,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553548558] [2022-11-03 01:54:51,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:51,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:51,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:51,771 INFO L87 Difference]: Start difference. First operand 57 states and 81 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:51,828 INFO L93 Difference]: Finished difference Result 213 states and 307 transitions. [2022-11-03 01:54:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:54:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:51,832 INFO L225 Difference]: With dead ends: 213 [2022-11-03 01:54:51,833 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 01:54:51,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:51,836 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 218 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:51,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 301 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 01:54:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 59. [2022-11-03 01:54:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 58 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 01:54:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 83 transitions. [2022-11-03 01:54:51,857 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 83 transitions. Word has length 9 [2022-11-03 01:54:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:51,858 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 83 transitions. [2022-11-03 01:54:51,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 83 transitions. [2022-11-03 01:54:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:54:51,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:51,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:51,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:52,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 01:54:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407844832] [2022-11-03 01:54:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:52,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:52,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:54:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 01:54:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:52,422 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 01:54:52,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:52,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:52,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407844832] [2022-11-03 01:54:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407844832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:52,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:52,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:54:52,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355687348] [2022-11-03 01:54:52,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:52,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:54:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:52,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:54:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:54:52,432 INFO L87 Difference]: Start difference. First operand 59 states and 83 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:52,794 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2022-11-03 01:54:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:54:52,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:54:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:52,796 INFO L225 Difference]: With dead ends: 113 [2022-11-03 01:54:52,796 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 01:54:52,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:54:52,798 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 281 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:52,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 501 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 01:54:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 61. [2022-11-03 01:54:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 60 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 01:54:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-11-03 01:54:52,804 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 9 [2022-11-03 01:54:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:52,805 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-11-03 01:54:52,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-11-03 01:54:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:54:52,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:52,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:52,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:53,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:53,019 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1420143283, now seen corresponding path program 1 times [2022-11-03 01:54:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:53,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313333] [2022-11-03 01:54:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:53,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:53,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:53,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:54:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:54:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:53,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:53,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:53,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313333] [2022-11-03 01:54:53,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:53,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:53,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284190001] [2022-11-03 01:54:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:53,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:53,291 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:53,331 INFO L93 Difference]: Finished difference Result 211 states and 304 transitions. [2022-11-03 01:54:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:53,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:54:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:53,333 INFO L225 Difference]: With dead ends: 211 [2022-11-03 01:54:53,333 INFO L226 Difference]: Without dead ends: 158 [2022-11-03 01:54:53,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 01:54:53,335 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 184 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:53,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 298 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-03 01:54:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 71. [2022-11-03 01:54:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 01:54:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2022-11-03 01:54:53,355 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 60 [2022-11-03 01:54:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:53,355 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2022-11-03 01:54:53,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2022-11-03 01:54:53,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:54:53,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:53,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:53,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:53,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 522750005, now seen corresponding path program 1 times [2022-11-03 01:54:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614544554] [2022-11-03 01:54:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:53,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:53,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:53,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:54:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:53,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:54:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:53,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:53,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614544554] [2022-11-03 01:54:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614544554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:53,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:53,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:54:53,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584443711] [2022-11-03 01:54:53,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:53,921 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:54,050 INFO L93 Difference]: Finished difference Result 207 states and 296 transitions. [2022-11-03 01:54:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:54:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:54:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:54,052 INFO L225 Difference]: With dead ends: 207 [2022-11-03 01:54:54,052 INFO L226 Difference]: Without dead ends: 154 [2022-11-03 01:54:54,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:54:54,056 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 305 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:54,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 241 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-03 01:54:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 91. [2022-11-03 01:54:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4111111111111112) internal successors, (127), 90 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 01:54:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 127 transitions. [2022-11-03 01:54:54,078 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 127 transitions. Word has length 60 [2022-11-03 01:54:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:54,079 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 127 transitions. [2022-11-03 01:54:54,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 127 transitions. [2022-11-03 01:54:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:54:54,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:54,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:54,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:54,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:54,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1926850125, now seen corresponding path program 1 times [2022-11-03 01:54:54,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:54,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097411456] [2022-11-03 01:54:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:54,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:54,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:54,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:54,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:54:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:54,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:54,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097411456] [2022-11-03 01:54:54,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097411456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:54,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:54,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:54,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780973941] [2022-11-03 01:54:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:54,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:54,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:54,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:54,733 INFO L87 Difference]: Start difference. First operand 91 states and 127 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:54,778 INFO L93 Difference]: Finished difference Result 259 states and 370 transitions. [2022-11-03 01:54:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:54,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:54:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:54,780 INFO L225 Difference]: With dead ends: 259 [2022-11-03 01:54:54,781 INFO L226 Difference]: Without dead ends: 194 [2022-11-03 01:54:54,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 01:54:54,782 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 133 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:54,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 297 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-03 01:54:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 115. [2022-11-03 01:54:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.412280701754386) internal successors, (161), 114 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 01:54:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2022-11-03 01:54:54,789 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 60 [2022-11-03 01:54:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:54,790 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2022-11-03 01:54:54,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2022-11-03 01:54:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:54:54,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:54,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:54,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:55,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:55,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash 562678837, now seen corresponding path program 1 times [2022-11-03 01:54:55,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:55,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690925724] [2022-11-03 01:54:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:55,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:55,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:55,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:54:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:54:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:55,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:55,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690925724] [2022-11-03 01:54:55,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690925724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:55,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:55,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:54:55,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643075522] [2022-11-03 01:54:55,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:55,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:54:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:54:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:54:55,496 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:55,655 INFO L93 Difference]: Finished difference Result 262 states and 373 transitions. [2022-11-03 01:54:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:54:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:54:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:55,657 INFO L225 Difference]: With dead ends: 262 [2022-11-03 01:54:55,657 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 01:54:55,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:54:55,658 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 190 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:55,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 721 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-03 01:54:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 01:54:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 133. [2022-11-03 01:54:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4090909090909092) internal successors, (186), 132 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 01:54:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2022-11-03 01:54:55,665 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 60 [2022-11-03 01:54:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:55,665 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2022-11-03 01:54:55,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2022-11-03 01:54:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:54:55,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:55,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:55,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:55,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:55,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 139977011, now seen corresponding path program 1 times [2022-11-03 01:54:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:55,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445653652] [2022-11-03 01:54:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:55,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:55,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:54:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:56,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:56,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445653652] [2022-11-03 01:54:56,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445653652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [449967153] [2022-11-03 01:54:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:56,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:56,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:56,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 01:54:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:57,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:57,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [449967153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:57,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981351910] [2022-11-03 01:54:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:57,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:57,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:57,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:57,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:54:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:57,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:58,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981351910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:58,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:58,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2022-11-03 01:54:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456273649] [2022-11-03 01:54:58,004 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:58,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:54:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:54:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:54:58,006 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 22 states, 22 states have (on average 8.409090909090908) internal successors, (185), 22 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 01:55:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:01,288 INFO L93 Difference]: Finished difference Result 1715 states and 2492 transitions. [2022-11-03 01:55:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-03 01:55:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.409090909090908) internal successors, (185), 22 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) Word has length 60 [2022-11-03 01:55:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:01,299 INFO L225 Difference]: With dead ends: 1715 [2022-11-03 01:55:01,300 INFO L226 Difference]: Without dead ends: 1650 [2022-11-03 01:55:01,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2045, Invalid=7855, Unknown=0, NotChecked=0, Total=9900 [2022-11-03 01:55:01,306 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8616 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8616 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:01,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8616 Valid, 648 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:55:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-03 01:55:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 292. [2022-11-03 01:55:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.4192439862542956) internal successors, (413), 291 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 01:55:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 413 transitions. [2022-11-03 01:55:01,335 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 413 transitions. Word has length 60 [2022-11-03 01:55:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:01,336 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 413 transitions. [2022-11-03 01:55:01,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.409090909090908) internal successors, (185), 22 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 01:55:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 413 transitions. [2022-11-03 01:55:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:01,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:01,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:01,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:01,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:01,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:01,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 197294895, now seen corresponding path program 1 times [2022-11-03 01:55:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099003945] [2022-11-03 01:55:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:01,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:01,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:01,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:55:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 01:55:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:03,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:06,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099003945] [2022-11-03 01:55:06,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099003945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175307677] [2022-11-03 01:55:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:06,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:06,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:06,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 01:55:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 01:55:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:07,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:08,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175307677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065398086] [2022-11-03 01:55:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:08,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:08,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:08,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:08,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:55:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 01:55:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:10,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065398086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:10,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:10,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 20, 20] total 38 [2022-11-03 01:55:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383936959] [2022-11-03 01:55:10,106 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:10,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:55:10,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:10,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:55:10,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:55:10,109 INFO L87 Difference]: Start difference. First operand 292 states and 413 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 01:55:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:14,424 INFO L93 Difference]: Finished difference Result 973 states and 1362 transitions. [2022-11-03 01:55:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 01:55:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 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 60 [2022-11-03 01:55:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:14,428 INFO L225 Difference]: With dead ends: 973 [2022-11-03 01:55:14,428 INFO L226 Difference]: Without dead ends: 971 [2022-11-03 01:55:14,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1193, Invalid=4969, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 01:55:14,431 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2079 mSDsluCounter, 3102 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1626 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:14,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 3276 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 696 Invalid, 0 Unknown, 1626 Unchecked, 0.8s Time] [2022-11-03 01:55:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-11-03 01:55:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 432. [2022-11-03 01:55:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.4106728538283062) internal successors, (608), 431 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 01:55:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 608 transitions. [2022-11-03 01:55:14,451 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 608 transitions. Word has length 60 [2022-11-03 01:55:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:14,451 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 608 transitions. [2022-11-03 01:55:14,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 01:55:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 608 transitions. [2022-11-03 01:55:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:14,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:14,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:14,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-03 01:55:14,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:14,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:15,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash 620941617, now seen corresponding path program 1 times [2022-11-03 01:55:15,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:15,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126988014] [2022-11-03 01:55:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:15,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:15,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:15,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:55:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:15,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:15,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126988014] [2022-11-03 01:55:15,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126988014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:15,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:15,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225940737] [2022-11-03 01:55:15,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:15,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:15,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:15,387 INFO L87 Difference]: Start difference. First operand 432 states and 608 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:15,522 INFO L93 Difference]: Finished difference Result 848 states and 1196 transitions. [2022-11-03 01:55:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:55:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:15,528 INFO L225 Difference]: With dead ends: 848 [2022-11-03 01:55:15,528 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 01:55:15,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:15,530 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 203 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:15,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 530 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-03 01:55:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 01:55:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 432. [2022-11-03 01:55:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.4013921113689096) internal successors, (604), 431 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 01:55:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 604 transitions. [2022-11-03 01:55:15,550 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 604 transitions. Word has length 60 [2022-11-03 01:55:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:15,551 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 604 transitions. [2022-11-03 01:55:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 604 transitions. [2022-11-03 01:55:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:15,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:15,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:15,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:15,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:15,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:15,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1090721651, now seen corresponding path program 1 times [2022-11-03 01:55:15,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:15,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737147919] [2022-11-03 01:55:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:15,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:15,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:15,774 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:15,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:55:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:15,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:55:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:15,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:15,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:15,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737147919] [2022-11-03 01:55:15,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737147919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:15,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:15,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:15,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012582834] [2022-11-03 01:55:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:15,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:15,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:15,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:15,987 INFO L87 Difference]: Start difference. First operand 432 states and 604 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:16,090 INFO L93 Difference]: Finished difference Result 639 states and 899 transitions. [2022-11-03 01:55:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:16,093 INFO L225 Difference]: With dead ends: 639 [2022-11-03 01:55:16,093 INFO L226 Difference]: Without dead ends: 325 [2022-11-03 01:55:16,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:55:16,094 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 288 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:16,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 229 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-03 01:55:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2022-11-03 01:55:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.396039603960396) internal successors, (423), 303 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 423 transitions. [2022-11-03 01:55:16,107 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 423 transitions. Word has length 60 [2022-11-03 01:55:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:16,107 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 423 transitions. [2022-11-03 01:55:16,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 423 transitions. [2022-11-03 01:55:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:16,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:16,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:16,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:16,328 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash -155793487, now seen corresponding path program 1 times [2022-11-03 01:55:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476882695] [2022-11-03 01:55:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:16,332 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:16,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:55:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:55:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:16,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:16,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476882695] [2022-11-03 01:55:16,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476882695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:16,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:16,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576458979] [2022-11-03 01:55:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:16,535 INFO L87 Difference]: Start difference. First operand 304 states and 423 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:16,660 INFO L93 Difference]: Finished difference Result 531 states and 740 transitions. [2022-11-03 01:55:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:16,662 INFO L225 Difference]: With dead ends: 531 [2022-11-03 01:55:16,662 INFO L226 Difference]: Without dead ends: 319 [2022-11-03 01:55:16,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:55:16,664 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 284 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:16,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 225 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-03 01:55:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 304. [2022-11-03 01:55:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.3828382838283828) internal successors, (419), 303 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 01:55:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 419 transitions. [2022-11-03 01:55:16,678 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 419 transitions. Word has length 60 [2022-11-03 01:55:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:16,679 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 419 transitions. [2022-11-03 01:55:16,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 419 transitions. [2022-11-03 01:55:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:16,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:16,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:16,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 01:55:16,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:16,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 181776177, now seen corresponding path program 1 times [2022-11-03 01:55:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482943175] [2022-11-03 01:55:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:16,902 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:16,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:55:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:17,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:55:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:17,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:17,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:17,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482943175] [2022-11-03 01:55:17,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482943175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:17,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:17,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:17,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399592090] [2022-11-03 01:55:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:17,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:17,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:17,128 INFO L87 Difference]: Start difference. First operand 304 states and 419 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:17,235 INFO L93 Difference]: Finished difference Result 492 states and 684 transitions. [2022-11-03 01:55:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:17,237 INFO L225 Difference]: With dead ends: 492 [2022-11-03 01:55:17,237 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 01:55:17,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:55:17,240 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 278 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:17,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 223 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 01:55:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2022-11-03 01:55:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.3932584269662922) internal successors, (372), 267 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 01:55:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 372 transitions. [2022-11-03 01:55:17,253 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 372 transitions. Word has length 60 [2022-11-03 01:55:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:17,255 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 372 transitions. [2022-11-03 01:55:17,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 372 transitions. [2022-11-03 01:55:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:17,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:17,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:17,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:17,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:17,482 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash 983752439, now seen corresponding path program 1 times [2022-11-03 01:55:17,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:17,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535773443] [2022-11-03 01:55:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:17,487 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:17,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:55:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:17,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:17,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:17,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535773443] [2022-11-03 01:55:17,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535773443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:17,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:17,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904186352] [2022-11-03 01:55:17,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:17,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:17,702 INFO L87 Difference]: Start difference. First operand 268 states and 372 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:17,797 INFO L93 Difference]: Finished difference Result 504 states and 704 transitions. [2022-11-03 01:55:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:17,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:17,800 INFO L225 Difference]: With dead ends: 504 [2022-11-03 01:55:17,800 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 01:55:17,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:55:17,801 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 228 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:17,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 261 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 01:55:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2022-11-03 01:55:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.3857677902621723) internal successors, (370), 267 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 01:55:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 370 transitions. [2022-11-03 01:55:17,819 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 370 transitions. Word has length 60 [2022-11-03 01:55:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:17,820 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 370 transitions. [2022-11-03 01:55:17,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 370 transitions. [2022-11-03 01:55:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:17,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:17,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:17,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:18,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:18,034 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 968233721, now seen corresponding path program 1 times [2022-11-03 01:55:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869018283] [2022-11-03 01:55:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:18,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:18,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:18,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:55:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:18,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:18,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:18,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869018283] [2022-11-03 01:55:18,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869018283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:18,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:18,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821531311] [2022-11-03 01:55:18,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:18,217 INFO L87 Difference]: Start difference. First operand 268 states and 370 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:18,316 INFO L93 Difference]: Finished difference Result 506 states and 702 transitions. [2022-11-03 01:55:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:18,318 INFO L225 Difference]: With dead ends: 506 [2022-11-03 01:55:18,318 INFO L226 Difference]: Without dead ends: 282 [2022-11-03 01:55:18,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:55:18,319 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 225 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:18,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 264 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-03 01:55:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 268. [2022-11-03 01:55:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.3782771535580525) internal successors, (368), 267 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 01:55:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 368 transitions. [2022-11-03 01:55:18,331 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 368 transitions. Word has length 60 [2022-11-03 01:55:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:18,332 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 368 transitions. [2022-11-03 01:55:18,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 368 transitions. [2022-11-03 01:55:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:18,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:18,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:18,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:18,554 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 615145339, now seen corresponding path program 1 times [2022-11-03 01:55:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:18,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283234582] [2022-11-03 01:55:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:18,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:18,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:18,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:18,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:55:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:18,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:18,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283234582] [2022-11-03 01:55:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283234582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:18,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:18,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18817774] [2022-11-03 01:55:18,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:18,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:18,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:18,771 INFO L87 Difference]: Start difference. First operand 268 states and 368 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:18,877 INFO L93 Difference]: Finished difference Result 423 states and 578 transitions. [2022-11-03 01:55:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:18,878 INFO L225 Difference]: With dead ends: 423 [2022-11-03 01:55:18,879 INFO L226 Difference]: Without dead ends: 223 [2022-11-03 01:55:18,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 01:55:18,881 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 222 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:18,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 267 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-03 01:55:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 207. [2022-11-03 01:55:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3446601941747574) internal successors, (277), 206 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 01:55:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 277 transitions. [2022-11-03 01:55:18,892 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 277 transitions. Word has length 60 [2022-11-03 01:55:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:18,892 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 277 transitions. [2022-11-03 01:55:18,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 277 transitions. [2022-11-03 01:55:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:18,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:18,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:18,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:19,110 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1508572095, now seen corresponding path program 1 times [2022-11-03 01:55:19,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:19,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357395542] [2022-11-03 01:55:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:19,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:19,112 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:19,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:55:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:19,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:19,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:19,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357395542] [2022-11-03 01:55:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357395542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:19,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998104706] [2022-11-03 01:55:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:19,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:19,458 INFO L87 Difference]: Start difference. First operand 207 states and 277 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:19,556 INFO L93 Difference]: Finished difference Result 422 states and 580 transitions. [2022-11-03 01:55:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:19,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:19,558 INFO L225 Difference]: With dead ends: 422 [2022-11-03 01:55:19,558 INFO L226 Difference]: Without dead ends: 265 [2022-11-03 01:55:19,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:55:19,560 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 176 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:19,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 798 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-03 01:55:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-03 01:55:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 207. [2022-11-03 01:55:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3398058252427185) internal successors, (276), 206 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 01:55:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 276 transitions. [2022-11-03 01:55:19,570 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 276 transitions. Word has length 60 [2022-11-03 01:55:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:19,570 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 276 transitions. [2022-11-03 01:55:19,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 276 transitions. [2022-11-03 01:55:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:19,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:19,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:19,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 01:55:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:19,785 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1932218817, now seen corresponding path program 1 times [2022-11-03 01:55:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:19,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69788583] [2022-11-03 01:55:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:19,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:19,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:19,788 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:19,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:55:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:19,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:19,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:19,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69788583] [2022-11-03 01:55:19,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69788583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:19,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:19,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750966542] [2022-11-03 01:55:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:19,960 INFO L87 Difference]: Start difference. First operand 207 states and 276 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:20,067 INFO L93 Difference]: Finished difference Result 484 states and 652 transitions. [2022-11-03 01:55:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:20,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:20,069 INFO L225 Difference]: With dead ends: 484 [2022-11-03 01:55:20,069 INFO L226 Difference]: Without dead ends: 331 [2022-11-03 01:55:20,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:20,070 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 215 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:20,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 386 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-03 01:55:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 207. [2022-11-03 01:55:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3300970873786409) internal successors, (274), 206 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 01:55:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2022-11-03 01:55:20,081 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 60 [2022-11-03 01:55:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:20,081 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2022-11-03 01:55:20,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2022-11-03 01:55:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:20,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:20,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:20,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:20,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:20,295 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1703216957, now seen corresponding path program 1 times [2022-11-03 01:55:20,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:20,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460795146] [2022-11-03 01:55:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:20,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:20,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:20,297 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:55:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:20,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:20,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:20,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:20,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460795146] [2022-11-03 01:55:20,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460795146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:20,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:20,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:20,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263398520] [2022-11-03 01:55:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:20,631 INFO L87 Difference]: Start difference. First operand 207 states and 274 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:20,719 INFO L93 Difference]: Finished difference Result 487 states and 666 transitions. [2022-11-03 01:55:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:20,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:20,721 INFO L225 Difference]: With dead ends: 487 [2022-11-03 01:55:20,721 INFO L226 Difference]: Without dead ends: 336 [2022-11-03 01:55:20,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:55:20,722 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 107 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:20,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 668 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 01:55:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-03 01:55:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 207. [2022-11-03 01:55:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.325242718446602) internal successors, (273), 206 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 01:55:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 273 transitions. [2022-11-03 01:55:20,733 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 273 transitions. Word has length 60 [2022-11-03 01:55:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:20,734 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 273 transitions. [2022-11-03 01:55:20,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 273 transitions. [2022-11-03 01:55:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:20,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:20,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:20,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:20,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:20,947 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1747744837, now seen corresponding path program 1 times [2022-11-03 01:55:20,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:20,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265885294] [2022-11-03 01:55:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:20,949 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:55:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:21,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:21,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:21,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265885294] [2022-11-03 01:55:21,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265885294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:21,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:21,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475674862] [2022-11-03 01:55:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:21,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:21,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:21,252 INFO L87 Difference]: Start difference. First operand 207 states and 273 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:21,354 INFO L93 Difference]: Finished difference Result 477 states and 650 transitions. [2022-11-03 01:55:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:21,356 INFO L225 Difference]: With dead ends: 477 [2022-11-03 01:55:21,356 INFO L226 Difference]: Without dead ends: 328 [2022-11-03 01:55:21,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:55:21,357 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 101 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:21,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 944 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-03 01:55:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-03 01:55:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 207. [2022-11-03 01:55:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3203883495145632) internal successors, (272), 206 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 01:55:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 272 transitions. [2022-11-03 01:55:21,368 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 272 transitions. Word has length 60 [2022-11-03 01:55:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:21,369 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 272 transitions. [2022-11-03 01:55:21,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 272 transitions. [2022-11-03 01:55:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:21,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:21,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:21,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:21,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:21,583 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1675358279, now seen corresponding path program 1 times [2022-11-03 01:55:21,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:21,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621224818] [2022-11-03 01:55:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:21,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:21,586 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:55:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:21,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:21,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621224818] [2022-11-03 01:55:21,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621224818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:21,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:21,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:21,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138217872] [2022-11-03 01:55:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:21,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:21,938 INFO L87 Difference]: Start difference. First operand 207 states and 272 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:22,018 INFO L93 Difference]: Finished difference Result 467 states and 634 transitions. [2022-11-03 01:55:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:22,021 INFO L225 Difference]: With dead ends: 467 [2022-11-03 01:55:22,021 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 01:55:22,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:55:22,022 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 95 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:22,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 642 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-11-03 01:55:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 01:55:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 207. [2022-11-03 01:55:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3155339805825244) internal successors, (271), 206 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 01:55:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2022-11-03 01:55:22,033 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 60 [2022-11-03 01:55:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:22,033 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2022-11-03 01:55:22,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2022-11-03 01:55:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:22,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:22,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:22,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:22,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1918009143, now seen corresponding path program 1 times [2022-11-03 01:55:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:22,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418891858] [2022-11-03 01:55:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:22,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:22,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:22,250 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:22,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:55:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:22,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:22,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:22,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418891858] [2022-11-03 01:55:22,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418891858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:22,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:22,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:22,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963425628] [2022-11-03 01:55:22,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:22,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:22,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:22,594 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:22,695 INFO L93 Difference]: Finished difference Result 457 states and 618 transitions. [2022-11-03 01:55:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:55:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:22,697 INFO L225 Difference]: With dead ends: 457 [2022-11-03 01:55:22,697 INFO L226 Difference]: Without dead ends: 312 [2022-11-03 01:55:22,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:22,698 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 136 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:22,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 738 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 01:55:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-03 01:55:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 207. [2022-11-03 01:55:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3106796116504855) internal successors, (270), 206 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 01:55:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 270 transitions. [2022-11-03 01:55:22,709 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 270 transitions. Word has length 60 [2022-11-03 01:55:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:22,709 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 270 transitions. [2022-11-03 01:55:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 270 transitions. [2022-11-03 01:55:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:22,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:22,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:22,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:22,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:22,923 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash -531805749, now seen corresponding path program 1 times [2022-11-03 01:55:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218012306] [2022-11-03 01:55:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:22,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:22,925 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:22,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:55:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:23,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:23,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:23,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218012306] [2022-11-03 01:55:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218012306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:23,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:23,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:23,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965751042] [2022-11-03 01:55:23,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:23,243 INFO L87 Difference]: Start difference. First operand 207 states and 270 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:23,320 INFO L93 Difference]: Finished difference Result 447 states and 602 transitions. [2022-11-03 01:55:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:23,322 INFO L225 Difference]: With dead ends: 447 [2022-11-03 01:55:23,322 INFO L226 Difference]: Without dead ends: 304 [2022-11-03 01:55:23,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:55:23,322 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 83 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:23,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 616 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-11-03 01:55:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-03 01:55:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 207. [2022-11-03 01:55:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3058252427184467) internal successors, (269), 206 states have internal predecessors, (269), 0 states have call successors, (0), 0 states 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 01:55:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 269 transitions. [2022-11-03 01:55:23,333 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 269 transitions. Word has length 60 [2022-11-03 01:55:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:23,334 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 269 transitions. [2022-11-03 01:55:23,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 269 transitions. [2022-11-03 01:55:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:23,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:23,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:23,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:23,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:23,547 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1391422285, now seen corresponding path program 1 times [2022-11-03 01:55:23,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:23,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64819004] [2022-11-03 01:55:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:23,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:23,550 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:23,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:55:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:23,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:23,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64819004] [2022-11-03 01:55:23,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64819004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:23,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:23,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:55:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048289571] [2022-11-03 01:55:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:23,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:55:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:55:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:55:23,882 INFO L87 Difference]: Start difference. First operand 207 states and 269 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:23,978 INFO L93 Difference]: Finished difference Result 417 states and 557 transitions. [2022-11-03 01:55:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:55:23,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:23,980 INFO L225 Difference]: With dead ends: 417 [2022-11-03 01:55:23,980 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 01:55:23,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:55:23,981 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 63 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:23,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 712 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 01:55:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 01:55:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 207. [2022-11-03 01:55:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3009708737864079) internal successors, (268), 206 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 01:55:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 268 transitions. [2022-11-03 01:55:23,992 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 268 transitions. Word has length 60 [2022-11-03 01:55:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:23,993 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 268 transitions. [2022-11-03 01:55:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 268 transitions. [2022-11-03 01:55:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:23,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:23,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:24,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:24,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:24,205 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:24,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1531970895, now seen corresponding path program 1 times [2022-11-03 01:55:24,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:24,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43112357] [2022-11-03 01:55:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:24,207 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:24,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:55:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:24,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:24,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:24,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43112357] [2022-11-03 01:55:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43112357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:24,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:24,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272406252] [2022-11-03 01:55:24,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:24,412 INFO L87 Difference]: Start difference. First operand 207 states and 268 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:24,529 INFO L93 Difference]: Finished difference Result 472 states and 627 transitions. [2022-11-03 01:55:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:24,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:24,531 INFO L225 Difference]: With dead ends: 472 [2022-11-03 01:55:24,532 INFO L226 Difference]: Without dead ends: 333 [2022-11-03 01:55:24,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:24,532 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 195 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:24,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 435 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-03 01:55:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 207. [2022-11-03 01:55:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.296116504854369) internal successors, (267), 206 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 01:55:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 267 transitions. [2022-11-03 01:55:24,544 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 267 transitions. Word has length 60 [2022-11-03 01:55:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:24,545 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 267 transitions. [2022-11-03 01:55:24,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 267 transitions. [2022-11-03 01:55:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:24,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:24,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:24,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:24,759 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -156972847, now seen corresponding path program 1 times [2022-11-03 01:55:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:24,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743246119] [2022-11-03 01:55:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:24,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:24,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:24,762 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:24,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:55:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:24,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:24,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743246119] [2022-11-03 01:55:24,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743246119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:24,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:24,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141154335] [2022-11-03 01:55:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:24,993 INFO L87 Difference]: Start difference. First operand 207 states and 267 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:25,126 INFO L93 Difference]: Finished difference Result 474 states and 627 transitions. [2022-11-03 01:55:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:25,129 INFO L225 Difference]: With dead ends: 474 [2022-11-03 01:55:25,129 INFO L226 Difference]: Without dead ends: 335 [2022-11-03 01:55:25,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:25,130 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 192 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:25,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 436 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-03 01:55:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 207. [2022-11-03 01:55:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2912621359223302) internal successors, (266), 206 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 01:55:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 266 transitions. [2022-11-03 01:55:25,144 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 266 transitions. Word has length 60 [2022-11-03 01:55:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:25,144 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 266 transitions. [2022-11-03 01:55:25,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 266 transitions. [2022-11-03 01:55:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:25,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:25,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:25,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:25,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:25,360 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1745320749, now seen corresponding path program 1 times [2022-11-03 01:55:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:25,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791393636] [2022-11-03 01:55:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:25,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:25,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:25,362 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:25,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:55:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:25,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:25,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:25,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:25,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791393636] [2022-11-03 01:55:25,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791393636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:25,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:25,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:25,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931773989] [2022-11-03 01:55:25,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:25,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:25,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:25,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:25,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:25,607 INFO L87 Difference]: Start difference. First operand 207 states and 266 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:25,725 INFO L93 Difference]: Finished difference Result 476 states and 627 transitions. [2022-11-03 01:55:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:25,727 INFO L225 Difference]: With dead ends: 476 [2022-11-03 01:55:25,728 INFO L226 Difference]: Without dead ends: 337 [2022-11-03 01:55:25,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:25,729 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 189 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:25,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 437 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-03 01:55:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 207. [2022-11-03 01:55:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2864077669902914) internal successors, (265), 206 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 01:55:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 265 transitions. [2022-11-03 01:55:25,741 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 265 transitions. Word has length 60 [2022-11-03 01:55:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:25,741 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 265 transitions. [2022-11-03 01:55:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 265 transitions. [2022-11-03 01:55:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:25,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:25,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:25,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:25,956 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1269782869, now seen corresponding path program 1 times [2022-11-03 01:55:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:25,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691736184] [2022-11-03 01:55:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:25,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:25,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:25,958 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:25,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:55:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:26,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:26,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:26,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691736184] [2022-11-03 01:55:26,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691736184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:26,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:26,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:26,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586386357] [2022-11-03 01:55:26,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:26,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:26,236 INFO L87 Difference]: Start difference. First operand 207 states and 265 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:26,347 INFO L93 Difference]: Finished difference Result 478 states and 627 transitions. [2022-11-03 01:55:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:26,349 INFO L225 Difference]: With dead ends: 478 [2022-11-03 01:55:26,349 INFO L226 Difference]: Without dead ends: 339 [2022-11-03 01:55:26,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:26,350 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 186 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:26,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 438 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-03 01:55:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 207. [2022-11-03 01:55:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2815533980582525) internal successors, (264), 206 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 01:55:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2022-11-03 01:55:26,361 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 60 [2022-11-03 01:55:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:26,361 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2022-11-03 01:55:26,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2022-11-03 01:55:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:26,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:26,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:26,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:26,575 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 682976855, now seen corresponding path program 1 times [2022-11-03 01:55:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:26,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673945247] [2022-11-03 01:55:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:26,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:26,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:26,577 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:26,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:55:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:26,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:26,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:26,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:26,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673945247] [2022-11-03 01:55:26,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673945247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:26,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:26,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85291029] [2022-11-03 01:55:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:26,787 INFO L87 Difference]: Start difference. First operand 207 states and 264 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:26,898 INFO L93 Difference]: Finished difference Result 480 states and 627 transitions. [2022-11-03 01:55:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:26,900 INFO L225 Difference]: With dead ends: 480 [2022-11-03 01:55:26,901 INFO L226 Difference]: Without dead ends: 341 [2022-11-03 01:55:26,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:26,902 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 183 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:26,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 439 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-03 01:55:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 207. [2022-11-03 01:55:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2766990291262137) internal successors, (263), 206 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 01:55:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 263 transitions. [2022-11-03 01:55:26,913 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 263 transitions. Word has length 60 [2022-11-03 01:55:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:26,913 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 263 transitions. [2022-11-03 01:55:26,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 263 transitions. [2022-11-03 01:55:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:26,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:26,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:26,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:27,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:27,126 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1384041433, now seen corresponding path program 1 times [2022-11-03 01:55:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712556310] [2022-11-03 01:55:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:27,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:27,128 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:27,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:55:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:27,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:27,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:27,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:27,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712556310] [2022-11-03 01:55:27,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712556310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:27,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:27,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:55:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384884741] [2022-11-03 01:55:27,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:27,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:27,334 INFO L87 Difference]: Start difference. First operand 207 states and 263 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:27,452 INFO L93 Difference]: Finished difference Result 482 states and 627 transitions. [2022-11-03 01:55:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:55:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 01:55:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:27,453 INFO L225 Difference]: With dead ends: 482 [2022-11-03 01:55:27,453 INFO L226 Difference]: Without dead ends: 343 [2022-11-03 01:55:27,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 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 01:55:27,454 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 180 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:27,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 440 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-03 01:55:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 207. [2022-11-03 01:55:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2718446601941749) internal successors, (262), 206 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 01:55:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 262 transitions. [2022-11-03 01:55:27,466 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 262 transitions. Word has length 60 [2022-11-03 01:55:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:27,466 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 262 transitions. [2022-11-03 01:55:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 262 transitions. [2022-11-03 01:55:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:27,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:27,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:27,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:27,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:27,680 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2064099803, now seen corresponding path program 1 times [2022-11-03 01:55:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:27,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114520620] [2022-11-03 01:55:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:27,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:27,682 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:27,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:55:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:28,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:28,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114520620] [2022-11-03 01:55:28,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114520620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025954151] [2022-11-03 01:55:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:28,183 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:28,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:55:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:28,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:28,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:28,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025954151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100994928] [2022-11-03 01:55:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:28,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:28,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:28,722 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 01:55:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:55:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:29,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:29,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100994928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:29,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:29,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2022-11-03 01:55:29,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351981077] [2022-11-03 01:55:29,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:55:29,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:55:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:55:29,223 INFO L87 Difference]: Start difference. First operand 207 states and 262 transitions. Second operand has 22 states, 22 states have (on average 8.409090909090908) internal successors, (185), 22 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 01:55:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:29,977 INFO L93 Difference]: Finished difference Result 914 states and 1203 transitions. [2022-11-03 01:55:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:55:29,977 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.409090909090908) internal successors, (185), 22 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) Word has length 60 [2022-11-03 01:55:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:29,981 INFO L225 Difference]: With dead ends: 914 [2022-11-03 01:55:29,981 INFO L226 Difference]: Without dead ends: 775 [2022-11-03 01:55:29,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:55:29,982 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1230 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:29,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1953 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:55:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-03 01:55:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 221. [2022-11-03 01:55:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.259090909090909) internal successors, (277), 220 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 01:55:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 277 transitions. [2022-11-03 01:55:29,995 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 277 transitions. Word has length 60 [2022-11-03 01:55:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:29,995 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 277 transitions. [2022-11-03 01:55:29,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.409090909090908) internal successors, (185), 22 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 01:55:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 277 transitions. [2022-11-03 01:55:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:55:29,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:29,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:30,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:30,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 01:55:30,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 01:55:30,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:30,609 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2121417687, now seen corresponding path program 1 times [2022-11-03 01:55:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:30,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004669006] [2022-11-03 01:55:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:30,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:30,612 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:30,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:55:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 01:55:30,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:31,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:35,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004669006] [2022-11-03 01:55:35,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004669006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708137324] [2022-11-03 01:55:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:35,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:35,805 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:35,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 01:55:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 01:55:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:36,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708137324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910273261] [2022-11-03 01:55:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:37,497 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:37,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 01:55:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:37,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 01:55:37,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:38,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910273261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:39,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:39,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 22, 22] total 42 [2022-11-03 01:55:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409018463] [2022-11-03 01:55:39,449 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:39,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 01:55:39,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 01:55:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:55:39,451 INFO L87 Difference]: Start difference. First operand 221 states and 277 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 01:55:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:41,916 INFO L93 Difference]: Finished difference Result 378 states and 486 transitions. [2022-11-03 01:55:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:55:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 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 60 [2022-11-03 01:55:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:41,917 INFO L225 Difference]: With dead ends: 378 [2022-11-03 01:55:41,917 INFO L226 Difference]: Without dead ends: 376 [2022-11-03 01:55:41,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=407, Invalid=3253, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 01:55:41,920 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 641 mSDsluCounter, 4503 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 4672 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:41,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 4672 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 440 Invalid, 0 Unknown, 598 Unchecked, 0.5s Time] [2022-11-03 01:55:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-03 01:55:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 221. [2022-11-03 01:55:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.259090909090909) internal successors, (277), 220 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 01:55:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 277 transitions. [2022-11-03 01:55:41,934 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 277 transitions. Word has length 60 [2022-11-03 01:55:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:41,935 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 277 transitions. [2022-11-03 01:55:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 01:55:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 277 transitions. [2022-11-03 01:55:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:41,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:41,937 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:41,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:42,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:42,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:55:42,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:42,541 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1321003091, now seen corresponding path program 1 times [2022-11-03 01:55:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:42,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630763410] [2022-11-03 01:55:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:42,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:42,543 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:42,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:55:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:42,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:43,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630763410] [2022-11-03 01:55:43,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630763410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999587492] [2022-11-03 01:55:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:43,171 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:43,172 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:43,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 01:55:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:55:43,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:43,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999587492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:43,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:43,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:55:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908588727] [2022-11-03 01:55:43,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:43,571 INFO L87 Difference]: Start difference. First operand 221 states and 277 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:43,704 INFO L93 Difference]: Finished difference Result 548 states and 698 transitions. [2022-11-03 01:55:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:43,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:43,705 INFO L225 Difference]: With dead ends: 548 [2022-11-03 01:55:43,705 INFO L226 Difference]: Without dead ends: 409 [2022-11-03 01:55:43,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:43,707 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 220 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:43,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 480 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-03 01:55:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 227. [2022-11-03 01:55:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.252212389380531) internal successors, (283), 226 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 01:55:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 283 transitions. [2022-11-03 01:55:43,723 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 283 transitions. Word has length 111 [2022-11-03 01:55:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:43,723 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 283 transitions. [2022-11-03 01:55:43,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 283 transitions. [2022-11-03 01:55:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:43,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:43,725 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:43,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:43,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:44,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:44,129 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2129958703, now seen corresponding path program 1 times [2022-11-03 01:55:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:44,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727432716] [2022-11-03 01:55:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:44,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:44,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:44,131 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:44,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:55:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:44,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:44,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727432716] [2022-11-03 01:55:44,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727432716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031367455] [2022-11-03 01:55:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:44,737 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:44,739 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:44,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 01:55:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:55:45,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031367455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:45,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:45,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:55:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453999591] [2022-11-03 01:55:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:45,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:45,138 INFO L87 Difference]: Start difference. First operand 227 states and 283 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:45,284 INFO L93 Difference]: Finished difference Result 556 states and 703 transitions. [2022-11-03 01:55:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:45,287 INFO L225 Difference]: With dead ends: 556 [2022-11-03 01:55:45,287 INFO L226 Difference]: Without dead ends: 411 [2022-11-03 01:55:45,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:45,288 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 217 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:45,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 481 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-03 01:55:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 229. [2022-11-03 01:55:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.2456140350877194) internal successors, (284), 228 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 01:55:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 284 transitions. [2022-11-03 01:55:45,301 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 284 transitions. Word has length 111 [2022-11-03 01:55:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:45,301 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 284 transitions. [2022-11-03 01:55:45,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 284 transitions. [2022-11-03 01:55:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:45,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:45,302 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:45,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 01:55:45,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 01:55:45,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:45,705 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:45,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2057572145, now seen corresponding path program 1 times [2022-11-03 01:55:45,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:45,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341114535] [2022-11-03 01:55:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:45,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:45,708 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:45,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:55:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:46,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:46,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:46,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341114535] [2022-11-03 01:55:46,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341114535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:46,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [444510624] [2022-11-03 01:55:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:46,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:46,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:46,273 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:46,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 01:55:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:46,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:55:46,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:46,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [444510624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:46,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:46,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:55:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260839175] [2022-11-03 01:55:46,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:46,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:46,624 INFO L87 Difference]: Start difference. First operand 229 states and 284 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:46,742 INFO L93 Difference]: Finished difference Result 560 states and 703 transitions. [2022-11-03 01:55:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:46,745 INFO L225 Difference]: With dead ends: 560 [2022-11-03 01:55:46,745 INFO L226 Difference]: Without dead ends: 413 [2022-11-03 01:55:46,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:46,745 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 214 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:46,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 482 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-03 01:55:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 231. [2022-11-03 01:55:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.2391304347826086) internal successors, (285), 230 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 01:55:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 285 transitions. [2022-11-03 01:55:46,755 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 285 transitions. Word has length 111 [2022-11-03 01:55:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:46,755 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 285 transitions. [2022-11-03 01:55:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 285 transitions. [2022-11-03 01:55:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:46,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:46,756 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:46,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 01:55:46,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:47,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:47,173 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1535795277, now seen corresponding path program 1 times [2022-11-03 01:55:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:47,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003507279] [2022-11-03 01:55:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:47,176 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:47,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:55:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:47,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:47,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:47,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:47,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003507279] [2022-11-03 01:55:47,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003507279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [872891823] [2022-11-03 01:55:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:47,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:47,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:47,756 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:47,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 01:55:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:48,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:55:48,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:48,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [872891823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:48,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:48,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:55:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026829111] [2022-11-03 01:55:48,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:48,132 INFO L87 Difference]: Start difference. First operand 231 states and 285 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:48,249 INFO L93 Difference]: Finished difference Result 564 states and 703 transitions. [2022-11-03 01:55:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:48,252 INFO L225 Difference]: With dead ends: 564 [2022-11-03 01:55:48,252 INFO L226 Difference]: Without dead ends: 415 [2022-11-03 01:55:48,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:48,253 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 211 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:48,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 483 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-03 01:55:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 233. [2022-11-03 01:55:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.2327586206896552) internal successors, (286), 232 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 01:55:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 286 transitions. [2022-11-03 01:55:48,282 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 286 transitions. Word has length 111 [2022-11-03 01:55:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:48,282 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 286 transitions. [2022-11-03 01:55:48,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 286 transitions. [2022-11-03 01:55:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:48,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:48,284 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:48,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-03 01:55:48,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-03 01:55:48,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:48,686 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:48,687 INFO L85 PathProgramCache]: Analyzing trace with hash -149591883, now seen corresponding path program 1 times [2022-11-03 01:55:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:48,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141263887] [2022-11-03 01:55:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:48,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:48,689 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:48,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:55:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:49,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:49,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:49,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141263887] [2022-11-03 01:55:49,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141263887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:49,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455389977] [2022-11-03 01:55:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:49,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:49,237 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:49,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 01:55:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:49,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:55:49,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:49,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455389977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:49,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:49,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:55:49,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505560172] [2022-11-03 01:55:49,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:49,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:49,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:49,637 INFO L87 Difference]: Start difference. First operand 233 states and 286 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:49,790 INFO L93 Difference]: Finished difference Result 568 states and 703 transitions. [2022-11-03 01:55:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:49,793 INFO L225 Difference]: With dead ends: 568 [2022-11-03 01:55:49,793 INFO L226 Difference]: Without dead ends: 417 [2022-11-03 01:55:49,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:49,800 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 208 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 484 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-03 01:55:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 235. [2022-11-03 01:55:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2264957264957266) internal successors, (287), 234 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 01:55:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 287 transitions. [2022-11-03 01:55:49,818 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 287 transitions. Word has length 111 [2022-11-03 01:55:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:49,818 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 287 transitions. [2022-11-03 01:55:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 287 transitions. [2022-11-03 01:55:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:49,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:49,820 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:49,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:50,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 01:55:50,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:50,223 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1773636151, now seen corresponding path program 1 times [2022-11-03 01:55:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:50,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283914123] [2022-11-03 01:55:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:50,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:50,226 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:50,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:55:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:50,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:50,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:50,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283914123] [2022-11-03 01:55:50,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283914123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:50,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635549353] [2022-11-03 01:55:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:50,792 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:50,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:50,793 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 01:55:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:55:51,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:51,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635549353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:51,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:51,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:55:51,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066634285] [2022-11-03 01:55:51,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:51,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:51,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:51,177 INFO L87 Difference]: Start difference. First operand 235 states and 287 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:51,301 INFO L93 Difference]: Finished difference Result 572 states and 703 transitions. [2022-11-03 01:55:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:51,304 INFO L225 Difference]: With dead ends: 572 [2022-11-03 01:55:51,304 INFO L226 Difference]: Without dead ends: 419 [2022-11-03 01:55:51,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:55:51,306 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 205 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:51,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 485 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-03 01:55:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 237. [2022-11-03 01:55:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.2203389830508475) internal successors, (288), 236 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 01:55:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 288 transitions. [2022-11-03 01:55:51,320 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 288 transitions. Word has length 111 [2022-11-03 01:55:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 288 transitions. [2022-11-03 01:55:51,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:55:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 288 transitions. [2022-11-03 01:55:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:51,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:51,322 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:51,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:51,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:51,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:51,736 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1914184761, now seen corresponding path program 1 times [2022-11-03 01:55:51,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:51,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178766562] [2022-11-03 01:55:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:51,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:51,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:51,739 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:51,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 01:55:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:51,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:52,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:52,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178766562] [2022-11-03 01:55:52,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178766562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1234043986] [2022-11-03 01:55:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:52,390 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:52,391 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:52,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 01:55:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:53,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:53,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1234043986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979723019] [2022-11-03 01:55:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:53,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:53,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:53,136 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:53,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 01:55:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:55:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:53,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979723019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:53,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:53,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:55:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162913004] [2022-11-03 01:55:53,642 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:53,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:55:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:55:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:55:53,644 INFO L87 Difference]: Start difference. First operand 237 states and 288 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 01:55:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:54,018 INFO L93 Difference]: Finished difference Result 832 states and 1037 transitions. [2022-11-03 01:55:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:55:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:54,020 INFO L225 Difference]: With dead ends: 832 [2022-11-03 01:55:54,020 INFO L226 Difference]: Without dead ends: 677 [2022-11-03 01:55:54,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:55:54,021 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1126 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:54,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 671 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:55:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-03 01:55:54,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 305. [2022-11-03 01:55:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.2171052631578947) internal successors, (370), 304 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 01:55:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 370 transitions. [2022-11-03 01:55:54,040 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 370 transitions. Word has length 111 [2022-11-03 01:55:54,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:54,040 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 370 transitions. [2022-11-03 01:55:54,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 01:55:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 370 transitions. [2022-11-03 01:55:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:54,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:54,042 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:55:54,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:54,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 01:55:54,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:54,647 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1016791483, now seen corresponding path program 1 times [2022-11-03 01:55:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:54,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166013656] [2022-11-03 01:55:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:54,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:54,649 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:54,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 01:55:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:54,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:55:55,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:55:55,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166013656] [2022-11-03 01:55:55,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166013656] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:55,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:55:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247194496] [2022-11-03 01:55:55,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:55,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:55:55,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:55:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:55:55,207 INFO L87 Difference]: Start difference. First operand 305 states and 370 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:55:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:55,357 INFO L93 Difference]: Finished difference Result 571 states and 691 transitions. [2022-11-03 01:55:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:55:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:55,359 INFO L225 Difference]: With dead ends: 571 [2022-11-03 01:55:55,359 INFO L226 Difference]: Without dead ends: 352 [2022-11-03 01:55:55,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:55:55,360 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 387 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:55,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 361 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-03 01:55:55,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2022-11-03 01:55:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2097378277153559) internal successors, (323), 267 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 01:55:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 323 transitions. [2022-11-03 01:55:55,373 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 323 transitions. Word has length 111 [2022-11-03 01:55:55,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:55,373 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 323 transitions. [2022-11-03 01:55:55,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:55:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 323 transitions. [2022-11-03 01:55:55,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:55,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:55,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:55,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 01:55:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:55,585 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash -561807287, now seen corresponding path program 1 times [2022-11-03 01:55:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:55,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077249994] [2022-11-03 01:55:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:55,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:55,587 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:55,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 01:55:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:55,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:55:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:55:56,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:55:56,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077249994] [2022-11-03 01:55:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077249994] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 01:55:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606866113] [2022-11-03 01:55:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:55:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:55:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:55:56,177 INFO L87 Difference]: Start difference. First operand 268 states and 323 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:55:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:56,305 INFO L93 Difference]: Finished difference Result 438 states and 529 transitions. [2022-11-03 01:55:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:55:56,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 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 111 [2022-11-03 01:55:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:56,307 INFO L225 Difference]: With dead ends: 438 [2022-11-03 01:55:56,307 INFO L226 Difference]: Without dead ends: 256 [2022-11-03 01:55:56,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:55:56,308 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 230 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:56,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 352 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-03 01:55:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 229. [2022-11-03 01:55:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.1885964912280702) internal successors, (271), 228 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 01:55:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-11-03 01:55:56,323 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 111 [2022-11-03 01:55:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:56,324 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-11-03 01:55:56,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:55:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-11-03 01:55:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:55:56,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:56,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:56,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 01:55:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:55:56,537 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1197940009, now seen corresponding path program 1 times [2022-11-03 01:55:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864016436] [2022-11-03 01:55:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:56,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:56,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:56,539 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:56,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 01:55:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:56,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:55:56,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:57,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:57,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:57,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864016436] [2022-11-03 01:55:57,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864016436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284184596] [2022-11-03 01:55:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:57,577 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:57,581 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:57,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 01:55:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:55:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:58,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:59,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284184596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:59,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841516806] [2022-11-03 01:55:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:59,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:59,362 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:59,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 01:55:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:55:59,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:00,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:00,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841516806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:00,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:56:00,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 12, 12, 12] total 49 [2022-11-03 01:56:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975948940] [2022-11-03 01:56:00,791 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 01:56:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:56:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 01:56:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:56:00,794 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 49 states, 49 states have (on average 11.857142857142858) internal successors, (581), 49 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 01:57:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:05,733 INFO L93 Difference]: Finished difference Result 11153 states and 14830 transitions. [2022-11-03 01:57:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 828 states. [2022-11-03 01:57:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 11.857142857142858) internal successors, (581), 49 states have internal predecessors, (581), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:05,764 INFO L225 Difference]: With dead ends: 11153 [2022-11-03 01:57:05,764 INFO L226 Difference]: Without dead ends: 11010 [2022-11-03 01:57:05,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1487 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 873 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353450 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=52587, Invalid=712163, Unknown=0, NotChecked=0, Total=764750 [2022-11-03 01:57:05,826 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 51955 mSDsluCounter, 6878 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 5322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51955 SdHoareTripleChecker+Valid, 7131 SdHoareTripleChecker+Invalid, 13942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5322 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3771 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:05,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51955 Valid, 7131 Invalid, 13942 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5322 Valid, 4849 Invalid, 0 Unknown, 3771 Unchecked, 6.7s Time] [2022-11-03 01:57:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2022-11-03 01:57:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 990. [2022-11-03 01:57:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.2163801820020221) internal successors, (1203), 989 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states 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 01:57:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1203 transitions. [2022-11-03 01:57:05,981 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1203 transitions. Word has length 111 [2022-11-03 01:57:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:05,982 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1203 transitions. [2022-11-03 01:57:05,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 11.857142857142858) internal successors, (581), 49 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 01:57:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1203 transitions. [2022-11-03 01:57:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:05,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:05,985 INFO L195 NwaCegarLoop]: trace histogram [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, 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 01:57:06,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:06,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-03 01:57:06,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-03 01:57:06,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:06,601 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1348906837, now seen corresponding path program 1 times [2022-11-03 01:57:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:06,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720411610] [2022-11-03 01:57:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:06,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:06,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:06,603 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:06,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 01:57:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:06,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 01:57:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:08,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:19,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720411610] [2022-11-03 01:57:19,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720411610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2140899665] [2022-11-03 01:57:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:19,500 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:19,501 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:19,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 01:57:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 01:57:19,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:20,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:22,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2140899665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:22,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685524789] [2022-11-03 01:57:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:22,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:22,381 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:22,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-03 01:57:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 01:57:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:23,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:25,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685524789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:25,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:57:25,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36, 36, 37, 37] total 72 [2022-11-03 01:57:25,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98696225] [2022-11-03 01:57:25,321 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:25,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 01:57:25,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:25,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 01:57:25,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4860, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 01:57:25,323 INFO L87 Difference]: Start difference. First operand 990 states and 1203 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 01:57:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:37,255 INFO L93 Difference]: Finished difference Result 3005 states and 3862 transitions. [2022-11-03 01:57:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-03 01:57:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:37,262 INFO L225 Difference]: With dead ends: 3005 [2022-11-03 01:57:37,262 INFO L226 Difference]: Without dead ends: 3003 [2022-11-03 01:57:37,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 594 SyntacticMatches, 7 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4188 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=2141, Invalid=18739, Unknown=0, NotChecked=0, Total=20880 [2022-11-03 01:57:37,265 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1107 mSDsluCounter, 7569 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 7764 SdHoareTripleChecker+Invalid, 4803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3225 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:37,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 7764 Invalid, 4803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1518 Invalid, 0 Unknown, 3225 Unchecked, 1.4s Time] [2022-11-03 01:57:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-11-03 01:57:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 1397. [2022-11-03 01:57:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 1.2213467048710602) internal successors, (1705), 1396 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states 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 01:57:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1705 transitions. [2022-11-03 01:57:37,489 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1705 transitions. Word has length 111 [2022-11-03 01:57:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:37,489 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1705 transitions. [2022-11-03 01:57:37,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 01:57:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1705 transitions. [2022-11-03 01:57:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:37,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:37,494 INFO L195 NwaCegarLoop]: trace histogram [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, 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 01:57:37,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:37,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 01:57:37,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-03 01:57:38,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:38,098 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1550730771, now seen corresponding path program 1 times [2022-11-03 01:57:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:38,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463618501] [2022-11-03 01:57:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:38,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:38,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:38,102 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:38,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 01:57:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:38,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:57:38,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:38,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463618501] [2022-11-03 01:57:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463618501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:38,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:38,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558576124] [2022-11-03 01:57:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:38,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:38,397 INFO L87 Difference]: Start difference. First operand 1397 states and 1705 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:57:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:38,632 INFO L93 Difference]: Finished difference Result 3107 states and 3866 transitions. [2022-11-03 01:57:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:38,636 INFO L225 Difference]: With dead ends: 3107 [2022-11-03 01:57:38,637 INFO L226 Difference]: Without dead ends: 1850 [2022-11-03 01:57:38,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:57:38,639 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 263 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:38,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 283 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-11-03 01:57:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1397. [2022-11-03 01:57:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 1.2041547277936964) internal successors, (1681), 1396 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1681 transitions. [2022-11-03 01:57:38,758 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1681 transitions. Word has length 111 [2022-11-03 01:57:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:38,758 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1681 transitions. [2022-11-03 01:57:38,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:57:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1681 transitions. [2022-11-03 01:57:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:38,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:38,762 INFO L195 NwaCegarLoop]: trace histogram [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, 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 01:57:38,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 01:57:38,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:38,975 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1294513939, now seen corresponding path program 1 times [2022-11-03 01:57:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411868110] [2022-11-03 01:57:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:38,978 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 01:57:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:57:39,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:39,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411868110] [2022-11-03 01:57:39,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411868110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:39,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:39,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980294480] [2022-11-03 01:57:39,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:39,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:39,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:39,255 INFO L87 Difference]: Start difference. First operand 1397 states and 1681 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 01:57:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:39,473 INFO L93 Difference]: Finished difference Result 3003 states and 3666 transitions. [2022-11-03 01:57:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:39,477 INFO L225 Difference]: With dead ends: 3003 [2022-11-03 01:57:39,477 INFO L226 Difference]: Without dead ends: 1746 [2022-11-03 01:57:39,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:57:39,479 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 260 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:39,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 275 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-11-03 01:57:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1397. [2022-11-03 01:57:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 1.1869627507163323) internal successors, (1657), 1396 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states 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 01:57:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1657 transitions. [2022-11-03 01:57:39,591 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1657 transitions. Word has length 111 [2022-11-03 01:57:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:39,591 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1657 transitions. [2022-11-03 01:57:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 01:57:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1657 transitions. [2022-11-03 01:57:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:39,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:39,594 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:39,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:39,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:39,807 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2049378603, now seen corresponding path program 1 times [2022-11-03 01:57:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:39,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539157570] [2022-11-03 01:57:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:39,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:39,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:39,809 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:39,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 01:57:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:40,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:40,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539157570] [2022-11-03 01:57:40,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539157570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:40,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:40,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:40,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759467167] [2022-11-03 01:57:40,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:40,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:40,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:40,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:40,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:40,090 INFO L87 Difference]: Start difference. First operand 1397 states and 1657 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 01:57:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:40,241 INFO L93 Difference]: Finished difference Result 2605 states and 3143 transitions. [2022-11-03 01:57:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:40,244 INFO L225 Difference]: With dead ends: 2605 [2022-11-03 01:57:40,244 INFO L226 Difference]: Without dead ends: 1348 [2022-11-03 01:57:40,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:57:40,246 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 257 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:40,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 267 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-11-03 01:57:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1137. [2022-11-03 01:57:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.1875) internal successors, (1349), 1136 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states 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 01:57:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1349 transitions. [2022-11-03 01:57:40,343 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1349 transitions. Word has length 111 [2022-11-03 01:57:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:40,343 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1349 transitions. [2022-11-03 01:57:40,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 01:57:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1349 transitions. [2022-11-03 01:57:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:40,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:40,346 INFO L195 NwaCegarLoop]: trace histogram [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, 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 01:57:40,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:40,560 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 168963217, now seen corresponding path program 1 times [2022-11-03 01:57:40,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:40,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394058535] [2022-11-03 01:57:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:40,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:40,562 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:40,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 01:57:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:40,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:57:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:40,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:40,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:40,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394058535] [2022-11-03 01:57:40,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394058535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:40,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:40,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:57:40,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984010907] [2022-11-03 01:57:40,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:40,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:40,965 INFO L87 Difference]: Start difference. First operand 1137 states and 1349 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:57:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:41,165 INFO L93 Difference]: Finished difference Result 2618 states and 3092 transitions. [2022-11-03 01:57:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:41,172 INFO L225 Difference]: With dead ends: 2618 [2022-11-03 01:57:41,172 INFO L226 Difference]: Without dead ends: 1589 [2022-11-03 01:57:41,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:57:41,174 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 167 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:41,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 667 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 01:57:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-03 01:57:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1105. [2022-11-03 01:57:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.1856884057971016) internal successors, (1309), 1104 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states 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 01:57:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1309 transitions. [2022-11-03 01:57:41,249 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1309 transitions. Word has length 111 [2022-11-03 01:57:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:41,250 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1309 transitions. [2022-11-03 01:57:41,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:57:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1309 transitions. [2022-11-03 01:57:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:41,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:41,252 INFO L195 NwaCegarLoop]: trace histogram [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, 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 01:57:41,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:41,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:41,466 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2107026797, now seen corresponding path program 1 times [2022-11-03 01:57:41,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56484811] [2022-11-03 01:57:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:41,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:41,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:41,468 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:41,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 01:57:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:57:41,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:57:41,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:41,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56484811] [2022-11-03 01:57:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56484811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:41,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:57:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743633385] [2022-11-03 01:57:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:41,803 INFO L87 Difference]: Start difference. First operand 1105 states and 1309 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:41,972 INFO L93 Difference]: Finished difference Result 2370 states and 2808 transitions. [2022-11-03 01:57:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-03 01:57:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:41,975 INFO L225 Difference]: With dead ends: 2370 [2022-11-03 01:57:41,975 INFO L226 Difference]: Without dead ends: 1349 [2022-11-03 01:57:41,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:57:41,976 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 166 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:41,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 589 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-03 01:57:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2022-11-03 01:57:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1081. [2022-11-03 01:57:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.1861111111111111) internal successors, (1281), 1080 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states 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 01:57:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1281 transitions. [2022-11-03 01:57:42,075 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1281 transitions. Word has length 111 [2022-11-03 01:57:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:42,076 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1281 transitions. [2022-11-03 01:57:42,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1281 transitions. [2022-11-03 01:57:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:42,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:42,078 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:42,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 01:57:42,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,292 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash 354153557, now seen corresponding path program 1 times [2022-11-03 01:57:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:42,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206071625] [2022-11-03 01:57:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:42,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:42,294 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:42,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 01:57:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:42,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:57:42,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:42,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206071625] [2022-11-03 01:57:42,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206071625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:42,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:42,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:42,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228345683] [2022-11-03 01:57:42,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:42,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:42,524 INFO L87 Difference]: Start difference. First operand 1081 states and 1281 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 01:57:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:42,647 INFO L93 Difference]: Finished difference Result 1656 states and 1955 transitions. [2022-11-03 01:57:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:42,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:42,649 INFO L225 Difference]: With dead ends: 1656 [2022-11-03 01:57:42,649 INFO L226 Difference]: Without dead ends: 629 [2022-11-03 01:57:42,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:57:42,650 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 243 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:42,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 217 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-03 01:57:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 603. [2022-11-03 01:57:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.1727574750830565) internal successors, (706), 602 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 01:57:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 706 transitions. [2022-11-03 01:57:42,684 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 706 transitions. Word has length 111 [2022-11-03 01:57:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 706 transitions. [2022-11-03 01:57:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 01:57:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 706 transitions. [2022-11-03 01:57:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:42,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:42,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:42,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:42,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,899 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash 298224557, now seen corresponding path program 1 times [2022-11-03 01:57:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:42,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974830274] [2022-11-03 01:57:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:42,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:42,902 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:42,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 01:57:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:43,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:43,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:43,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974830274] [2022-11-03 01:57:43,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974830274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1853626002] [2022-11-03 01:57:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:43,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:43,409 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:43,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 01:57:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:43,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:43,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:44,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1853626002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:44,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101443881] [2022-11-03 01:57:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:44,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:44,054 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:44,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 01:57:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:44,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101443881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:44,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:57:44,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:57:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520109981] [2022-11-03 01:57:44,505 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:44,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:57:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:57:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:44,506 INFO L87 Difference]: Start difference. First operand 603 states and 706 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 01:57:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:44,886 INFO L93 Difference]: Finished difference Result 2061 states and 2432 transitions. [2022-11-03 01:57:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:57:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:44,889 INFO L225 Difference]: With dead ends: 2061 [2022-11-03 01:57:44,889 INFO L226 Difference]: Without dead ends: 1512 [2022-11-03 01:57:44,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:57:44,890 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 473 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:44,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1128 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-11-03 01:57:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 662. [2022-11-03 01:57:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.161875945537065) internal successors, (768), 661 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 01:57:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 768 transitions. [2022-11-03 01:57:44,931 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 768 transitions. Word has length 111 [2022-11-03 01:57:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:44,931 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 768 transitions. [2022-11-03 01:57:44,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 01:57:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 768 transitions. [2022-11-03 01:57:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:44,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:44,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:44,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:45,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:45,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:45,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:45,534 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -599168721, now seen corresponding path program 1 times [2022-11-03 01:57:45,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:45,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346770491] [2022-11-03 01:57:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:45,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:45,536 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:45,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 01:57:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:57:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:46,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:46,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346770491] [2022-11-03 01:57:46,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346770491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:46,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62680974] [2022-11-03 01:57:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:46,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:46,473 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:46,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 01:57:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:57:46,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:47,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:47,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62680974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:47,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107527934] [2022-11-03 01:57:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:47,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:47,372 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:47,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 01:57:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:47,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:57:47,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:48,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:48,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107527934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:48,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:57:48,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 38 [2022-11-03 01:57:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668297552] [2022-11-03 01:57:48,510 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:48,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:57:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:57:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:57:48,512 INFO L87 Difference]: Start difference. First operand 662 states and 768 transitions. Second operand has 38 states, 38 states have (on average 10.236842105263158) internal successors, (389), 38 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 01:57:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:51,376 INFO L93 Difference]: Finished difference Result 2753 states and 3320 transitions. [2022-11-03 01:57:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 01:57:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 10.236842105263158) internal successors, (389), 38 states have internal predecessors, (389), 0 states have call successors, (0), 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 111 [2022-11-03 01:57:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:51,379 INFO L225 Difference]: With dead ends: 2753 [2022-11-03 01:57:51,379 INFO L226 Difference]: Without dead ends: 2204 [2022-11-03 01:57:51,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1431, Invalid=5709, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 01:57:51,381 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 2399 mSDsluCounter, 4002 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 4220 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:51,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2399 Valid, 4220 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:57:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-11-03 01:57:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 645. [2022-11-03 01:57:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.1645962732919255) internal successors, (750), 644 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 01:57:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 750 transitions. [2022-11-03 01:57:51,425 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 750 transitions. Word has length 111 [2022-11-03 01:57:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:51,426 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 750 transitions. [2022-11-03 01:57:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.236842105263158) internal successors, (389), 38 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 01:57:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 750 transitions. [2022-11-03 01:57:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:57:51,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:51,428 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:57:51,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:51,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:51,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:52,041 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -541850837, now seen corresponding path program 1 times [2022-11-03 01:57:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:52,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124756072] [2022-11-03 01:57:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:52,044 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:52,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 01:57:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 01:57:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:08,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124756072] [2022-11-03 01:58:08,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124756072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29030243] [2022-11-03 01:58:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:08,013 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:08,017 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:08,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 01:58:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 01:58:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:09,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:11,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29030243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029863114] [2022-11-03 01:58:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:11,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:11,196 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:11,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 01:58:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:11,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 01:58:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:12,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029863114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:14,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:14,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 76 [2022-11-03 01:58:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791902398] [2022-11-03 01:58:14,782 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 01:58:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 01:58:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5510, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:58:14,784 INFO L87 Difference]: Start difference. First operand 645 states and 750 transitions. Second operand has 76 states, 76 states have (on average 2.9473684210526314) internal successors, (224), 76 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 01:58:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:27,825 INFO L93 Difference]: Finished difference Result 1249 states and 1482 transitions. [2022-11-03 01:58:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 01:58:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9473684210526314) internal successors, (224), 76 states have internal predecessors, (224), 0 states have call successors, (0), 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 111 [2022-11-03 01:58:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:27,827 INFO L225 Difference]: With dead ends: 1249 [2022-11-03 01:58:27,827 INFO L226 Difference]: Without dead ends: 1247 [2022-11-03 01:58:27,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 586 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1879, Invalid=14633, Unknown=0, NotChecked=0, Total=16512 [2022-11-03 01:58:27,829 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1524 mSDsluCounter, 5473 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 5554 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2200 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:27,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 5554 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1231 Invalid, 0 Unknown, 2200 Unchecked, 1.1s Time] [2022-11-03 01:58:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-11-03 01:58:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 657. [2022-11-03 01:58:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.1615853658536586) internal successors, (762), 656 states have internal predecessors, (762), 0 states have call successors, (0), 0 states 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 01:58:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 762 transitions. [2022-11-03 01:58:27,866 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 762 transitions. Word has length 111 [2022-11-03 01:58:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:27,866 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 762 transitions. [2022-11-03 01:58:27,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9473684210526314) internal successors, (224), 76 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 01:58:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 762 transitions. [2022-11-03 01:58:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:58:27,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:27,867 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-03 01:58:27,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 01:58:28,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-11-03 01:58:28,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-03 01:58:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:28,469 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -618751635, now seen corresponding path program 1 times [2022-11-03 01:58:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:28,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258499599] [2022-11-03 01:58:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:28,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:28,471 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 01:58:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:58:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:58:28,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:28,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258499599] [2022-11-03 01:58:28,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258499599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:28,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:28,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:58:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361530684] [2022-11-03 01:58:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:58:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:58:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:58:28,824 INFO L87 Difference]: Start difference. First operand 657 states and 762 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:58:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:28,961 INFO L93 Difference]: Finished difference Result 1337 states and 1551 transitions. [2022-11-03 01:58:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:58:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 111 [2022-11-03 01:58:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:28,962 INFO L225 Difference]: With dead ends: 1337 [2022-11-03 01:58:28,962 INFO L226 Difference]: Without dead ends: 776 [2022-11-03 01:58:28,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:58:28,964 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 75 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:28,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 681 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 01:58:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-03 01:58:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 645. [2022-11-03 01:58:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.1630434782608696) internal successors, (749), 644 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 01:58:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 749 transitions. [2022-11-03 01:58:29,014 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 749 transitions. Word has length 111 [2022-11-03 01:58:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:29,015 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 749 transitions. [2022-11-03 01:58:29,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:58:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 749 transitions. [2022-11-03 01:58:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:58:29,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:29,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 01:58:29,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 01:58:29,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:29,221 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash 531220693, now seen corresponding path program 2 times [2022-11-03 01:58:29,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:29,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592548228] [2022-11-03 01:58:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:58:29,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:29,223 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:29,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 01:58:29,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:58:29,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:58:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 114 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:58:29,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:58:29,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:29,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592548228] [2022-11-03 01:58:29,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592548228] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:29,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:58:29,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:58:29,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830127478] [2022-11-03 01:58:29,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:29,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:58:29,849 INFO L87 Difference]: Start difference. First operand 645 states and 749 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 01:58:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:30,041 INFO L93 Difference]: Finished difference Result 1399 states and 1629 transitions. [2022-11-03 01:58:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:58:30,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 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 162 [2022-11-03 01:58:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:30,043 INFO L225 Difference]: With dead ends: 1399 [2022-11-03 01:58:30,043 INFO L226 Difference]: Without dead ends: 850 [2022-11-03 01:58:30,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:58:30,044 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 339 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:30,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 382 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-03 01:58:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 637. [2022-11-03 01:58:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.1525157232704402) internal successors, (733), 636 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 01:58:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 733 transitions. [2022-11-03 01:58:30,103 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 733 transitions. Word has length 162 [2022-11-03 01:58:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:30,103 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 733 transitions. [2022-11-03 01:58:30,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 01:58:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 733 transitions. [2022-11-03 01:58:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:58:30,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:30,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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 01:58:30,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:30,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:30,319 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash -725623725, now seen corresponding path program 1 times [2022-11-03 01:58:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028935639] [2022-11-03 01:58:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:30,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:30,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:30,322 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:30,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 01:58:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:58:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 114 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:58:30,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:58:30,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028935639] [2022-11-03 01:58:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028935639] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:30,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:58:30,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 01:58:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645609653] [2022-11-03 01:58:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:30,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:30,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:58:30,950 INFO L87 Difference]: Start difference. First operand 637 states and 733 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 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 01:58:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:31,124 INFO L93 Difference]: Finished difference Result 1108 states and 1277 transitions. [2022-11-03 01:58:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 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 162 [2022-11-03 01:58:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:31,126 INFO L225 Difference]: With dead ends: 1108 [2022-11-03 01:58:31,126 INFO L226 Difference]: Without dead ends: 559 [2022-11-03 01:58:31,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:58:31,127 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 283 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:31,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 314 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-11-03 01:58:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 485. [2022-11-03 01:58:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.1322314049586777) internal successors, (548), 484 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 01:58:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 548 transitions. [2022-11-03 01:58:31,150 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 548 transitions. Word has length 162 [2022-11-03 01:58:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:31,150 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 548 transitions. [2022-11-03 01:58:31,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 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 01:58:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 548 transitions. [2022-11-03 01:58:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:58:31,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:31,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 01:58:31,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:31,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:31,352 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1293353557, now seen corresponding path program 3 times [2022-11-03 01:58:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:31,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275361512] [2022-11-03 01:58:31,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:58:31,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:31,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:31,354 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:31,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 01:58:31,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:58:31,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:58:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:58:31,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275361512] [2022-11-03 01:58:31,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275361512] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:31,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:58:31,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-03 01:58:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921042388] [2022-11-03 01:58:31,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:31,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:58:31,806 INFO L87 Difference]: Start difference. First operand 485 states and 548 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 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 01:58:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:31,958 INFO L93 Difference]: Finished difference Result 811 states and 923 transitions. [2022-11-03 01:58:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 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 162 [2022-11-03 01:58:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:31,959 INFO L225 Difference]: With dead ends: 811 [2022-11-03 01:58:31,959 INFO L226 Difference]: Without dead ends: 410 [2022-11-03 01:58:31,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:58:31,960 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 278 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:31,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 308 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-03 01:58:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 316. [2022-11-03 01:58:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1238095238095238) internal successors, (354), 315 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 01:58:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 354 transitions. [2022-11-03 01:58:31,985 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 354 transitions. Word has length 162 [2022-11-03 01:58:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:31,985 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 354 transitions. [2022-11-03 01:58:31,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 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 01:58:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 354 transitions. [2022-11-03 01:58:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:58:31,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:31,987 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 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] [2022-11-03 01:58:32,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:32,200 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -596362385, now seen corresponding path program 1 times [2022-11-03 01:58:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358398714] [2022-11-03 01:58:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:32,203 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:32,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 01:58:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:58:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 88 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:32,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 88 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:33,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358398714] [2022-11-03 01:58:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358398714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034939183] [2022-11-03 01:58:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:33,226 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:33,227 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:33,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 01:58:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:58:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 88 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:34,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 88 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:34,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1034939183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374944053] [2022-11-03 01:58:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:34,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:34,248 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-03 01:58:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:58:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 88 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:34,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 88 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374944053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:34,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:34,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 01:58:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805635291] [2022-11-03 01:58:34,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:58:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:58:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:58:34,960 INFO L87 Difference]: Start difference. First operand 316 states and 354 transitions. Second operand has 19 states, 19 states have (on average 13.105263157894736) internal successors, (249), 19 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 01:58:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:36,107 INFO L93 Difference]: Finished difference Result 1763 states and 2002 transitions. [2022-11-03 01:58:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 01:58:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 13.105263157894736) internal successors, (249), 19 states have internal predecessors, (249), 0 states have call successors, (0), 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 162 [2022-11-03 01:58:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:36,109 INFO L225 Difference]: With dead ends: 1763 [2022-11-03 01:58:36,109 INFO L226 Difference]: Without dead ends: 1499 [2022-11-03 01:58:36,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 949 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:58:36,110 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1878 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:36,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1878 Valid, 1580 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:58:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-11-03 01:58:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 473. [2022-11-03 01:58:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.1144067796610169) internal successors, (526), 472 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 01:58:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 526 transitions. [2022-11-03 01:58:36,138 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 526 transitions. Word has length 162 [2022-11-03 01:58:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:36,138 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 526 transitions. [2022-11-03 01:58:36,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.105263157894736) internal successors, (249), 19 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 01:58:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 526 transitions. [2022-11-03 01:58:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:58:36,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:36,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 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] [2022-11-03 01:58:36,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:36,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-11-03 01:58:36,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 01:58:36,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:36,740 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1493755663, now seen corresponding path program 2 times [2022-11-03 01:58:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:36,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011830526] [2022-11-03 01:58:36,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:58:36,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:36,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:36,742 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:36,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 01:58:36,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:58:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:58:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:37,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:38,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:38,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011830526] [2022-11-03 01:58:38,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011830526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:38,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [123167874] [2022-11-03 01:58:38,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:58:38,270 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:38,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:38,271 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:38,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 01:58:38,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:58:38,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:58:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [123167874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:39,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554961287] [2022-11-03 01:58:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:58:39,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:39,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:39,653 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:39,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-03 01:58:39,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:58:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:58:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:40,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554961287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:41,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 54 [2022-11-03 01:58:41,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222429726] [2022-11-03 01:58:41,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 01:58:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 01:58:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 01:58:41,595 INFO L87 Difference]: Start difference. First operand 473 states and 526 transitions. Second operand has 54 states, 54 states have (on average 10.981481481481481) internal successors, (593), 54 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 01:59:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:24,892 INFO L93 Difference]: Finished difference Result 10853 states and 12414 transitions. [2022-11-03 01:59:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 518 states. [2022-11-03 01:59:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 10.981481481481481) internal successors, (593), 54 states have internal predecessors, (593), 0 states have call successors, (0), 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 162 [2022-11-03 01:59:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:24,910 INFO L225 Difference]: With dead ends: 10853 [2022-11-03 01:59:24,910 INFO L226 Difference]: Without dead ends: 10432 [2022-11-03 01:59:24,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141055 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=31370, Invalid=292960, Unknown=0, NotChecked=0, Total=324330 [2022-11-03 01:59:24,929 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 15291 mSDsluCounter, 10556 mSDsCounter, 0 mSdLazyCounter, 9536 mSolverCounterSat, 1992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15291 SdHoareTripleChecker+Valid, 10806 SdHoareTripleChecker+Invalid, 11528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1992 IncrementalHoareTripleChecker+Valid, 9536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:24,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15291 Valid, 10806 Invalid, 11528 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1992 Valid, 9536 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-03 01:59:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2022-11-03 01:59:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 1523. [2022-11-03 01:59:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.092641261498029) internal successors, (1663), 1522 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states 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 01:59:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1663 transitions. [2022-11-03 01:59:25,094 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1663 transitions. Word has length 162 [2022-11-03 01:59:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:25,094 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 1663 transitions. [2022-11-03 01:59:25,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 10.981481481481481) internal successors, (593), 54 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 01:59:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1663 transitions. [2022-11-03 01:59:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:59:25,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:25,096 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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 01:59:25,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:25,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-11-03 01:59:25,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-11-03 01:59:25,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:25,697 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1436437779, now seen corresponding path program 1 times [2022-11-03 01:59:25,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:25,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320502407] [2022-11-03 01:59:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:25,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:25,699 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:25,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 01:59:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:25,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-03 01:59:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:29,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:54,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320502407] [2022-11-03 01:59:54,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320502407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [379473091] [2022-11-03 01:59:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:54,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:59:54,481 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:59:54,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-03 01:59:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-03 01:59:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:56,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:58,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [379473091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:58,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760770338] [2022-11-03 01:59:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:58,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:58,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:58,539 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:58,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-03 01:59:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-03 01:59:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:00,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:02,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760770338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:02,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:02,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55, 55, 56, 56] total 110 [2022-11-03 02:00:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702191283] [2022-11-03 02:00:02,870 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-03 02:00:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-03 02:00:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=11480, Unknown=0, NotChecked=0, Total=11990 [2022-11-03 02:00:02,873 INFO L87 Difference]: Start difference. First operand 1523 states and 1663 transitions. Second operand has 110 states, 110 states have (on average 2.963636363636364) internal successors, (326), 110 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 02:01:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:40,081 INFO L93 Difference]: Finished difference Result 4479 states and 4931 transitions. [2022-11-03 02:01:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-03 02:01:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.963636363636364) internal successors, (326), 110 states have internal predecessors, (326), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:40,086 INFO L225 Difference]: With dead ends: 4479 [2022-11-03 02:01:40,087 INFO L226 Difference]: Without dead ends: 4477 [2022-11-03 02:01:40,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 894 SyntacticMatches, 7 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22695 ImplicationChecksByTransitivity, 120.3s TimeCoverageRelationStatistics Valid=4041, Invalid=83871, Unknown=0, NotChecked=0, Total=87912 [2022-11-03 02:01:40,092 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 2079 mSDsluCounter, 13268 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 13447 SdHoareTripleChecker+Invalid, 15119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12291 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:40,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 13447 Invalid, 15119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2770 Invalid, 0 Unknown, 12291 Unchecked, 2.2s Time] [2022-11-03 02:01:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2022-11-03 02:01:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2422. [2022-11-03 02:01:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 1.10119785212722) internal successors, (2666), 2421 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states 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 02:01:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2666 transitions. [2022-11-03 02:01:40,375 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2666 transitions. Word has length 162 [2022-11-03 02:01:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:40,375 INFO L495 AbstractCegarLoop]: Abstraction has 2422 states and 2666 transitions. [2022-11-03 02:01:40,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.963636363636364) internal successors, (326), 110 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 02:01:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2666 transitions. [2022-11-03 02:01:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:40,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:40,378 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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 02:01:40,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-11-03 02:01:40,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:40,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2022-11-03 02:01:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:40,979 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1513338577, now seen corresponding path program 2 times [2022-11-03 02:01:40,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:40,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216643709] [2022-11-03 02:01:40,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:01:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:40,982 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:41,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 02:01:41,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:01:41,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 114 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:01:41,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:01:41,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216643709] [2022-11-03 02:01:41,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216643709] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:41,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:01:41,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 02:01:41,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950235468] [2022-11-03 02:01:41,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:41,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:01:41,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:01:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:41,626 INFO L87 Difference]: Start difference. First operand 2422 states and 2666 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 02:01:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:41,917 INFO L93 Difference]: Finished difference Result 4388 states and 4830 transitions. [2022-11-03 02:01:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:01:41,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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) Word has length 162 [2022-11-03 02:01:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:41,920 INFO L225 Difference]: With dead ends: 4388 [2022-11-03 02:01:41,920 INFO L226 Difference]: Without dead ends: 2430 [2022-11-03 02:01:41,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:01:41,921 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 214 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 416 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2022-11-03 02:01:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2194. [2022-11-03 02:01:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 1.0939352485180118) internal successors, (2399), 2193 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states 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 02:01:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2399 transitions. [2022-11-03 02:01:42,189 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2399 transitions. Word has length 162 [2022-11-03 02:01:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:42,189 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 2399 transitions. [2022-11-03 02:01:42,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 02:01:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2399 transitions. [2022-11-03 02:01:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:42,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:42,193 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 02:01:42,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 02:01:42,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:42,408 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash 290707183, now seen corresponding path program 1 times [2022-11-03 02:01:42,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:42,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527213695] [2022-11-03 02:01:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:42,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:42,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:42,411 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:01:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:01:42,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:42,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527213695] [2022-11-03 02:01:42,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527213695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:42,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:42,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:01:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061613810] [2022-11-03 02:01:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:42,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:01:42,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:01:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:42,733 INFO L87 Difference]: Start difference. First operand 2194 states and 2399 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 02:01:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:43,013 INFO L93 Difference]: Finished difference Result 4420 states and 4823 transitions. [2022-11-03 02:01:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:01:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:43,015 INFO L225 Difference]: With dead ends: 4420 [2022-11-03 02:01:43,015 INFO L226 Difference]: Without dead ends: 2480 [2022-11-03 02:01:43,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 159 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 02:01:43,017 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 235 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:43,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 276 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2022-11-03 02:01:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2186. [2022-11-03 02:01:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.0842105263157895) internal successors, (2369), 2185 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states 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 02:01:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 2369 transitions. [2022-11-03 02:01:43,241 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 2369 transitions. Word has length 162 [2022-11-03 02:01:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:43,241 INFO L495 AbstractCegarLoop]: Abstraction has 2186 states and 2369 transitions. [2022-11-03 02:01:43,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 02:01:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 2369 transitions. [2022-11-03 02:01:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:43,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:43,245 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 02:01:43,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:43,454 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1136526831, now seen corresponding path program 1 times [2022-11-03 02:01:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:43,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315640897] [2022-11-03 02:01:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:43,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:43,456 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:43,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 02:01:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:43,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:01:43,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:43,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:43,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315640897] [2022-11-03 02:01:43,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315640897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:43,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:43,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:01:43,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074215101] [2022-11-03 02:01:43,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:43,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:01:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:43,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:01:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:43,771 INFO L87 Difference]: Start difference. First operand 2186 states and 2369 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 02:01:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:44,020 INFO L93 Difference]: Finished difference Result 4382 states and 4741 transitions. [2022-11-03 02:01:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:01:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:44,022 INFO L225 Difference]: With dead ends: 4382 [2022-11-03 02:01:44,023 INFO L226 Difference]: Without dead ends: 2418 [2022-11-03 02:01:44,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 159 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 02:01:44,024 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 232 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:44,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 268 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2022-11-03 02:01:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2154. [2022-11-03 02:01:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 1.0733859730608453) internal successors, (2311), 2153 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states 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 02:01:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2311 transitions. [2022-11-03 02:01:44,188 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2311 transitions. Word has length 162 [2022-11-03 02:01:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:44,188 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 2311 transitions. [2022-11-03 02:01:44,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 02:01:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2311 transitions. [2022-11-03 02:01:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:44,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:44,190 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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 02:01:44,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 02:01:44,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:44,391 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1005648975, now seen corresponding path program 1 times [2022-11-03 02:01:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699787381] [2022-11-03 02:01:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:44,393 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:44,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:01:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:44,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 02:01:44,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:44,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:44,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699787381] [2022-11-03 02:01:44,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699787381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:44,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:44,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:01:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305754798] [2022-11-03 02:01:44,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:44,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:01:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:01:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:44,710 INFO L87 Difference]: Start difference. First operand 2154 states and 2311 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 02:01:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:44,940 INFO L93 Difference]: Finished difference Result 3830 states and 4125 transitions. [2022-11-03 02:01:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:01:44,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:44,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:44,942 INFO L225 Difference]: With dead ends: 3830 [2022-11-03 02:01:44,942 INFO L226 Difference]: Without dead ends: 1910 [2022-11-03 02:01:44,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 159 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 02:01:44,943 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 229 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:44,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 260 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-03 02:01:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1722. [2022-11-03 02:01:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 1.074375363160953) internal successors, (1849), 1721 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states 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 02:01:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 1849 transitions. [2022-11-03 02:01:45,071 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 1849 transitions. Word has length 162 [2022-11-03 02:01:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:45,071 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 1849 transitions. [2022-11-03 02:01:45,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 02:01:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 1849 transitions. [2022-11-03 02:01:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:45,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:45,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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 02:01:45,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 02:01:45,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:45,274 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:45,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1083917075, now seen corresponding path program 1 times [2022-11-03 02:01:45,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:45,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702764705] [2022-11-03 02:01:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:45,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:45,275 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:45,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:01:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 02:01:45,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:45,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702764705] [2022-11-03 02:01:45,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702764705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:45,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:45,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:01:45,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186323573] [2022-11-03 02:01:45,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:01:45,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:01:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:01:45,710 INFO L87 Difference]: Start difference. First operand 1722 states and 1849 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 02:01:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:45,941 INFO L93 Difference]: Finished difference Result 3567 states and 3835 transitions. [2022-11-03 02:01:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:01:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:45,943 INFO L225 Difference]: With dead ends: 3567 [2022-11-03 02:01:45,943 INFO L226 Difference]: Without dead ends: 1906 [2022-11-03 02:01:45,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:01:45,945 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 154 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:45,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 574 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 02:01:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2022-11-03 02:01:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1703. [2022-11-03 02:01:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.0757931844888367) internal successors, (1831), 1702 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states 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 02:01:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1831 transitions. [2022-11-03 02:01:46,061 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1831 transitions. Word has length 162 [2022-11-03 02:01:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:46,062 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 1831 transitions. [2022-11-03 02:01:46,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 02:01:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1831 transitions. [2022-11-03 02:01:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:46,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:46,065 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 02:01:46,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:46,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:46,280 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1072971281, now seen corresponding path program 1 times [2022-11-03 02:01:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:46,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273728100] [2022-11-03 02:01:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:46,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:46,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:46,282 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:46,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 02:01:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-03 02:01:46,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:46,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273728100] [2022-11-03 02:01:46,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273728100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:46,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:46,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:01:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719591209] [2022-11-03 02:01:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:01:46,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:01:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:01:46,674 INFO L87 Difference]: Start difference. First operand 1703 states and 1831 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:46,891 INFO L93 Difference]: Finished difference Result 2878 states and 3095 transitions. [2022-11-03 02:01:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:01:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-11-03 02:01:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:46,893 INFO L225 Difference]: With dead ends: 2878 [2022-11-03 02:01:46,893 INFO L226 Difference]: Without dead ends: 1884 [2022-11-03 02:01:46,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:01:46,894 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 192 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:46,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 470 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 02:01:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-11-03 02:01:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1703. [2022-11-03 02:01:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.0740305522914217) internal successors, (1828), 1702 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 02:01:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1828 transitions. [2022-11-03 02:01:47,035 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1828 transitions. Word has length 162 [2022-11-03 02:01:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:47,036 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 1828 transitions. [2022-11-03 02:01:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1828 transitions. [2022-11-03 02:01:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:47,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:47,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 02:01:47,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 02:01:47,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:47,238 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash -37484177, now seen corresponding path program 1 times [2022-11-03 02:01:47,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:47,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104746610] [2022-11-03 02:01:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:47,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:47,240 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:47,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 02:01:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-03 02:01:47,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:47,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104746610] [2022-11-03 02:01:47,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104746610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:47,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:47,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:01:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902607884] [2022-11-03 02:01:47,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:47,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:01:47,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:01:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:01:47,627 INFO L87 Difference]: Start difference. First operand 1703 states and 1828 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 02:01:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:47,843 INFO L93 Difference]: Finished difference Result 2788 states and 2995 transitions. [2022-11-03 02:01:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:01:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:47,845 INFO L225 Difference]: With dead ends: 2788 [2022-11-03 02:01:47,845 INFO L226 Difference]: Without dead ends: 1790 [2022-11-03 02:01:47,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:01:47,846 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 152 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:47,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 556 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-11-03 02:01:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-03 02:01:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1699. [2022-11-03 02:01:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.0730270906949353) internal successors, (1822), 1698 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states 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 02:01:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 1822 transitions. [2022-11-03 02:01:47,992 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 1822 transitions. Word has length 162 [2022-11-03 02:01:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:47,992 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 1822 transitions. [2022-11-03 02:01:47,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 02:01:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 1822 transitions. [2022-11-03 02:01:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:47,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:47,994 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2022-11-03 02:01:48,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 02:01:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:48,194 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2040954545, now seen corresponding path program 1 times [2022-11-03 02:01:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138289834] [2022-11-03 02:01:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:48,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:48,196 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:48,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:01:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 02:01:48,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:48,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138289834] [2022-11-03 02:01:48,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138289834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:48,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:48,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:01:48,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048196917] [2022-11-03 02:01:48,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:48,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:01:48,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:01:48,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:01:48,583 INFO L87 Difference]: Start difference. First operand 1699 states and 1822 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 02:01:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:48,786 INFO L93 Difference]: Finished difference Result 2707 states and 2909 transitions. [2022-11-03 02:01:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:01:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 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 162 [2022-11-03 02:01:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:48,788 INFO L225 Difference]: With dead ends: 2707 [2022-11-03 02:01:48,788 INFO L226 Difference]: Without dead ends: 1711 [2022-11-03 02:01:48,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:01:48,789 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 188 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:48,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 515 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 02:01:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-11-03 02:01:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1693. [2022-11-03 02:01:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 1.072695035460993) internal successors, (1815), 1692 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states 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 02:01:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 1815 transitions. [2022-11-03 02:01:48,904 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 1815 transitions. Word has length 162 [2022-11-03 02:01:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:48,904 INFO L495 AbstractCegarLoop]: Abstraction has 1693 states and 1815 transitions. [2022-11-03 02:01:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 02:01:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 1815 transitions. [2022-11-03 02:01:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:01:48,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:48,906 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:48,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 02:01:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:49,106 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash -383446055, now seen corresponding path program 2 times [2022-11-03 02:01:49,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:49,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550950734] [2022-11-03 02:01:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:01:49,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:49,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:49,108 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:49,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 02:01:49,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:01:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-03 02:01:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 23 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:58,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 3 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:22,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:22,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550950734] [2022-11-03 02:02:22,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550950734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:22,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1780230041] [2022-11-03 02:02:22,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:22,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:22,962 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:22,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-03 02:02:23,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-03 02:02:23,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:49,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 3 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:04,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1780230041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:04,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573625289] [2022-11-03 02:03:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:03:04,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:04,369 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:04,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-03 02:03:04,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:03:04,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:04,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-03 02:03:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:10,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:47,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573625289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:47,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:47,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55, 55, 56, 56] total 231 [2022-11-03 02:03:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620504280] [2022-11-03 02:03:47,405 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 231 states [2022-11-03 02:03:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2022-11-03 02:03:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1348, Invalid=51780, Unknown=2, NotChecked=0, Total=53130 [2022-11-03 02:03:47,411 INFO L87 Difference]: Start difference. First operand 1693 states and 1815 transitions. Second operand has 231 states, 231 states have (on average 3.0562770562770565) internal successors, (706), 231 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 02:05:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:03,814 INFO L93 Difference]: Finished difference Result 6108 states and 6611 transitions. [2022-11-03 02:05:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-03 02:05:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 231 states, 231 states have (on average 3.0562770562770565) internal successors, (706), 231 states have internal predecessors, (706), 0 states have call successors, (0), 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 162 [2022-11-03 02:05:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:03,817 INFO L225 Difference]: With dead ends: 6108 [2022-11-03 02:05:03,817 INFO L226 Difference]: Without dead ends: 6106 [2022-11-03 02:05:03,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1175 GetRequests, 748 SyntacticMatches, 4 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68851 ImplicationChecksByTransitivity, 175.1s TimeCoverageRelationStatistics Valid=7303, Invalid=172893, Unknown=4, NotChecked=0, Total=180200 [2022-11-03 02:05:03,831 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 1182 mSDsluCounter, 21978 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 22157 SdHoareTripleChecker+Invalid, 14991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14636 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:03,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 22157 Invalid, 14991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 342 Invalid, 0 Unknown, 14636 Unchecked, 0.5s Time] [2022-11-03 02:05:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2022-11-03 02:05:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 5209. [2022-11-03 02:05:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 5208 states have (on average 1.0785330261136712) internal successors, (5617), 5208 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states 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 02:05:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 5617 transitions. [2022-11-03 02:05:04,291 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 5617 transitions. Word has length 162 [2022-11-03 02:05:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:04,291 INFO L495 AbstractCegarLoop]: Abstraction has 5209 states and 5617 transitions. [2022-11-03 02:05:04,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 231 states, 231 states have (on average 3.0562770562770565) internal successors, (706), 231 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 02:05:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 5617 transitions. [2022-11-03 02:05:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:05:04,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:04,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:04,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:04,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:04,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 02:05:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:04,897 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:04,897 INFO L85 PathProgramCache]: Analyzing trace with hash -383386473, now seen corresponding path program 1 times [2022-11-03 02:05:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:04,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564046718] [2022-11-03 02:05:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:04,899 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:04,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 02:05:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:05:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:06,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:08,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564046718] [2022-11-03 02:05:08,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564046718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2118752157] [2022-11-03 02:05:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:08,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:08,162 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:08,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 02:05:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:05:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:09,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:10,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2118752157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246274316] [2022-11-03 02:05:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:10,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:10,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:10,214 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-03 02:05:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:05:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:11,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:12,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246274316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:12,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:12,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23, 22, 23, 22] total 43 [2022-11-03 02:05:12,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443502565] [2022-11-03 02:05:12,060 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:12,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:05:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:05:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:05:12,061 INFO L87 Difference]: Start difference. First operand 5209 states and 5617 transitions. Second operand has 43 states, 43 states have (on average 7.441860465116279) internal successors, (320), 43 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 02:05:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:28,530 INFO L93 Difference]: Finished difference Result 20745 states and 22416 transitions. [2022-11-03 02:05:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-11-03 02:05:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.441860465116279) internal successors, (320), 43 states have internal predecessors, (320), 0 states have call successors, (0), 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 162 [2022-11-03 02:05:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:28,540 INFO L225 Difference]: With dead ends: 20745 [2022-11-03 02:05:28,541 INFO L226 Difference]: Without dead ends: 16331 [2022-11-03 02:05:28,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15741 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=2868, Invalid=42288, Unknown=0, NotChecked=0, Total=45156 [2022-11-03 02:05:28,546 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 1161 mSDsluCounter, 8125 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 8377 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1097 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:28,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 8377 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 810 Invalid, 0 Unknown, 1097 Unchecked, 1.1s Time] [2022-11-03 02:05:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2022-11-03 02:05:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 7541. [2022-11-03 02:05:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7541 states, 7540 states have (on average 1.08315649867374) internal successors, (8167), 7540 states have internal predecessors, (8167), 0 states have call successors, (0), 0 states 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 02:05:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 8167 transitions. [2022-11-03 02:05:29,210 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 8167 transitions. Word has length 162 [2022-11-03 02:05:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:29,211 INFO L495 AbstractCegarLoop]: Abstraction has 7541 states and 8167 transitions. [2022-11-03 02:05:29,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.441860465116279) internal successors, (320), 43 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 02:05:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 8167 transitions. [2022-11-03 02:05:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:05:29,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:29,214 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:29,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:29,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-03 02:05:29,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 02:05:29,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:29,815 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:29,815 INFO L85 PathProgramCache]: Analyzing trace with hash -326187753, now seen corresponding path program 1 times [2022-11-03 02:05:29,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:29,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446414011] [2022-11-03 02:05:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:29,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:29,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:29,817 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:29,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:05:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:05:30,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 35 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:31,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:34,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446414011] [2022-11-03 02:05:34,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446414011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:34,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518181942] [2022-11-03 02:05:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,004 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:34,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:34,005 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:34,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 02:05:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:05:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 34 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:35,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:36,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518181942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:36,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993512352] [2022-11-03 02:05:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:36,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:36,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:36,939 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:36,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 02:05:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:05:37,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 35 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:38,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:39,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993512352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:39,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:39,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22, 21, 21, 21] total 41 [2022-11-03 02:05:39,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831549416] [2022-11-03 02:05:39,436 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:05:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:39,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:05:39,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:05:39,437 INFO L87 Difference]: Start difference. First operand 7541 states and 8167 transitions. Second operand has 41 states, 41 states have (on average 7.804878048780488) internal successors, (320), 41 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 02:05:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:42,505 INFO L93 Difference]: Finished difference Result 22738 states and 24589 transitions. [2022-11-03 02:05:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:05:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 7.804878048780488) internal successors, (320), 41 states have internal predecessors, (320), 0 states have call successors, (0), 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 162 [2022-11-03 02:05:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:42,515 INFO L225 Difference]: With dead ends: 22738 [2022-11-03 02:05:42,515 INFO L226 Difference]: Without dead ends: 15992 [2022-11-03 02:05:42,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 924 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=362, Invalid=3670, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:05:42,519 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 535 mSDsluCounter, 7609 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 7912 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:42,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 7912 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 683 Unchecked, 0.3s Time] [2022-11-03 02:05:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15992 states. [2022-11-03 02:05:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15992 to 12851. [2022-11-03 02:05:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12851 states, 12850 states have (on average 1.08) internal successors, (13878), 12850 states have internal predecessors, (13878), 0 states have call successors, (0), 0 states 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 02:05:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12851 states to 12851 states and 13878 transitions. [2022-11-03 02:05:43,548 INFO L78 Accepts]: Start accepts. Automaton has 12851 states and 13878 transitions. Word has length 162 [2022-11-03 02:05:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:43,548 INFO L495 AbstractCegarLoop]: Abstraction has 12851 states and 13878 transitions. [2022-11-03 02:05:43,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 7.804878048780488) internal successors, (320), 41 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 02:05:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12851 states and 13878 transitions. [2022-11-03 02:05:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:05:43,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:43,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:43,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:43,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:43,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 02:05:44,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:44,153 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1280839333, now seen corresponding path program 2 times [2022-11-03 02:05:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271269845] [2022-11-03 02:05:44,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:05:44,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:44,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:44,155 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:44,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 02:05:44,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:05:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:05:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:05:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:47,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271269845] [2022-11-03 02:05:47,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271269845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [931012161] [2022-11-03 02:05:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:05:47,459 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:47,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:47,460 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:47,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-03 02:05:47,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:05:47,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:05:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:05:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:48,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:49,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [931012161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:49,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960907623] [2022-11-03 02:05:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:05:49,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:49,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:49,443 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:49,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-03 02:05:49,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:05:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:05:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:05:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:51,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960907623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:51,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:51,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23, 22, 23, 22] total 43 [2022-11-03 02:05:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499833490] [2022-11-03 02:05:51,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:05:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:05:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:05:51,122 INFO L87 Difference]: Start difference. First operand 12851 states and 13878 transitions. Second operand has 43 states, 43 states have (on average 7.465116279069767) internal successors, (321), 43 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:04,904 INFO L93 Difference]: Finished difference Result 40221 states and 43655 transitions. [2022-11-03 02:06:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-11-03 02:06:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.465116279069767) internal successors, (321), 43 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-11-03 02:06:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:04,923 INFO L225 Difference]: With dead ends: 40221 [2022-11-03 02:06:04,923 INFO L226 Difference]: Without dead ends: 28755 [2022-11-03 02:06:04,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 969 SyntacticMatches, 9 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 11834 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1796, Invalid=30784, Unknown=0, NotChecked=0, Total=32580 [2022-11-03 02:06:04,931 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 842 mSDsluCounter, 5927 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 6135 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 838 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:04,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 6135 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 838 Unchecked, 0.4s Time] [2022-11-03 02:06:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28755 states. [2022-11-03 02:06:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28755 to 12851. [2022-11-03 02:06:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12851 states, 12850 states have (on average 1.08) internal successors, (13878), 12850 states have internal predecessors, (13878), 0 states have call successors, (0), 0 states 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 02:06:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12851 states to 12851 states and 13878 transitions. [2022-11-03 02:06:05,962 INFO L78 Accepts]: Start accepts. Automaton has 12851 states and 13878 transitions. Word has length 162 [2022-11-03 02:06:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:05,962 INFO L495 AbstractCegarLoop]: Abstraction has 12851 states and 13878 transitions. [2022-11-03 02:06:05,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.465116279069767) internal successors, (321), 43 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 12851 states and 13878 transitions. [2022-11-03 02:06:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:06:05,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:05,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:05,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-03 02:06:06,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-11-03 02:06:06,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-03 02:06:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:06,566 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1280779751, now seen corresponding path program 1 times [2022-11-03 02:06:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:06,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445093324] [2022-11-03 02:06:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:06,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:06,568 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:06,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 02:06:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-03 02:06:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 23 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:17,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:48,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445093324] [2022-11-03 02:06:48,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445093324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368700608] [2022-11-03 02:06:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:48,442 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:48,443 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:48,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 02:06:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-03 02:06:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:20,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 3 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:04,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368700608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362188892] [2022-11-03 02:08:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:04,375 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:04,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8156f97f-1e7b-46d2-adda-d54be31fa87b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-03 02:08:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-03 02:08:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:09,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:14,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362188892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:14,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:14,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55, 55, 56, 56] total 209 [2022-11-03 02:08:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833543856] [2022-11-03 02:08:14,083 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:14,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2022-11-03 02:08:14,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:14,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2022-11-03 02:08:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=42258, Unknown=1, NotChecked=0, Total=43472 [2022-11-03 02:08:14,086 INFO L87 Difference]: Start difference. First operand 12851 states and 13878 transitions. Second operand has 209 states, 209 states have (on average 3.0574162679425836) internal successors, (639), 209 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)