./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF --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 32bit --witnessprinter.graph.data.programhash 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:41:51,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:41:51,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:41:51,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:41:51,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:41:51,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:41:51,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:41:51,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:41:51,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:41:51,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:41:51,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:41:51,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:41:51,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:41:51,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:41:51,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:41:51,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:41:51,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:41:51,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:41:51,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:41:51,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:41:51,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:41:51,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:41:51,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:41:51,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:41:51,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:41:51,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:41:51,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:41:51,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:41:51,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:41:51,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:41:51,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:41:51,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:41:51,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:41:51,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:41:51,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:41:51,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:41:51,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:41:51,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:41:51,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:41:51,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:41:51,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:41:51,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:41:51,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:41:51,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:41:51,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:41:51,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:41:51,886 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:41:51,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:41:51,887 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:41:51,887 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:41:51,887 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:41:51,887 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:41:51,888 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:41:51,888 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:41:51,888 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:41:51,888 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:41:51,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:41:51,889 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:41:51,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:41:51,890 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:41:51,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:41:51,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:41:51,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:41:51,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:41:51,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:41:51,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:41:51,892 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:41:51,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:41:51,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:41:51,892 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:41:51,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:41:51,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:41:51,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:41:51,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:41:51,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:41:51,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:41:51,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:41:51,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:41:51,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:41:51,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:41:51,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:41:51,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:41:51,895 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2021-11-12 22:41:52,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:41:52,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:41:52,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:41:52,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:41:52,194 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:41:52,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-12 22:41:52,275 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/bf62d94e6/514279d57ecd4a20a3d1dfa044588f4a/FLAGd9b5e1f05 [2021-11-12 22:41:52,994 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:41:52,994 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-12 22:41:53,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/bf62d94e6/514279d57ecd4a20a3d1dfa044588f4a/FLAGd9b5e1f05 [2021-11-12 22:41:53,171 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/bf62d94e6/514279d57ecd4a20a3d1dfa044588f4a [2021-11-12 22:41:53,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:41:53,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:41:53,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:53,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:41:53,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:41:53,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:53" (1/1) ... [2021-11-12 22:41:53,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd40111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:53, skipping insertion in model container [2021-11-12 22:41:53,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:53" (1/1) ... [2021-11-12 22:41:53,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:41:53,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:41:53,712 WARN L228 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_6542c0da-4e3c-44f9-a91d-c269220bf114/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-12 22:41:53,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:53,966 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:41:53,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65be36a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:53, skipping insertion in model container [2021-11-12 22:41:53,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:53,967 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:41:53,969 INFO L158 Benchmark]: Toolchain (without parser) took 793.92ms. Allocated memory is still 138.4MB. Free memory was 98.8MB in the beginning and 98.7MB in the end (delta: 117.1kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:41:53,970 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 138.4MB. Free memory was 117.7MB in the beginning and 117.6MB in the end (delta: 153.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:41:53,971 INFO L158 Benchmark]: CACSL2BoogieTranslator took 777.26ms. Allocated memory is still 138.4MB. Free memory was 98.5MB in the beginning and 98.7MB in the end (delta: -188.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:41:53,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 138.4MB. Free memory was 117.7MB in the beginning and 117.6MB in the end (delta: 153.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 777.26ms. Allocated memory is still 138.4MB. Free memory was 98.5MB in the beginning and 98.7MB in the end (delta: -188.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3005]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF --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 32bit --witnessprinter.graph.data.programhash 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:41:56,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:41:56,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:41:56,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:41:56,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:41:56,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:41:56,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:41:56,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:41:56,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:41:56,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:41:56,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:41:56,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:41:56,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:41:56,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:41:56,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:41:56,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:41:56,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:41:56,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:41:56,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:41:56,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:41:56,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:41:56,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:41:56,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:41:56,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:41:56,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:41:56,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:41:56,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:41:56,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:41:56,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:41:56,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:41:56,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:41:56,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:41:56,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:41:56,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:41:56,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:41:56,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:41:56,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:41:56,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:41:56,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:41:56,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:41:56,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:41:56,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:41:56,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:41:56,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:41:56,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:41:56,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:41:56,379 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:41:56,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:41:56,379 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:41:56,380 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:41:56,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:41:56,380 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:41:56,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:41:56,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:41:56,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:41:56,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:41:56,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:41:56,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:41:56,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:41:56,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:41:56,384 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:41:56,385 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:41:56,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:41:56,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:41:56,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:41:56,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:41:56,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:41:56,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:41:56,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:41:56,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:41:56,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:41:56,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:41:56,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:41:56,387 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:41:56,388 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:41:56,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:41:56,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:41:56,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:41:56,389 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_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2021-11-12 22:41:56,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:41:56,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:41:56,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:41:56,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:41:56,818 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:41:56,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-12 22:41:56,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/9f9e95282/e912e714dcb8460dbc22bfc82f3eb73f/FLAG97e7521c4 [2021-11-12 22:41:57,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:41:57,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-12 22:41:57,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/9f9e95282/e912e714dcb8460dbc22bfc82f3eb73f/FLAG97e7521c4 [2021-11-12 22:41:57,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/data/9f9e95282/e912e714dcb8460dbc22bfc82f3eb73f [2021-11-12 22:41:57,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:41:57,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:41:57,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:57,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:41:57,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:41:57,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:57" (1/1) ... [2021-11-12 22:41:57,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283213a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:57, skipping insertion in model container [2021-11-12 22:41:57,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:57" (1/1) ... [2021-11-12 22:41:57,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:41:57,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:41:58,285 WARN L228 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_6542c0da-4e3c-44f9-a91d-c269220bf114/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-12 22:41:58,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:58,537 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:41:58,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:41:58,615 WARN L228 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_6542c0da-4e3c-44f9-a91d-c269220bf114/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-12 22:41:58,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:58,754 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:41:58,817 WARN L228 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_6542c0da-4e3c-44f9-a91d-c269220bf114/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-12 22:41:58,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:58,935 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:41:58,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58 WrapperNode [2021-11-12 22:41:58,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:58,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:41:58,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:41:58,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:41:58,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:58,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:41:59,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:41:59,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:41:59,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:41:59,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:41:59,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:41:59,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:41:59,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:41:59,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (1/1) ... [2021-11-12 22:41:59,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:41:59,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:41:59,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:41:59,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:41:59,263 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:41:59,264 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:41:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:41:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:41:59,264 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:41:59,265 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:41:59,265 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:41:59,265 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:41:59,265 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:41:59,265 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:41:59,266 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:41:59,266 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:41:59,266 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:41:59,266 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:41:59,266 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:41:59,267 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:41:59,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:41:59,267 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:41:59,267 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:41:59,267 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:41:59,268 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:41:59,268 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:41:59,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:41:59,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:41:59,268 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 22:41:59,268 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 22:41:59,269 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:41:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:41:59,269 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 22:41:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 22:41:59,269 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:41:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:41:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:41:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:41:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:41:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:41:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:41:59,271 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:41:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:41:59,271 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:41:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:41:59,271 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:41:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:41:59,272 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:41:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:41:59,272 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:41:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:41:59,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:41:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:41:59,273 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:42:03,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:42:03,322 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:42:03,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:42:03 BoogieIcfgContainer [2021-11-12 22:42:03,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:42:03,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:42:03,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:42:03,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:42:03,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:41:57" (1/3) ... [2021-11-12 22:42:03,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289ccbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:42:03, skipping insertion in model container [2021-11-12 22:42:03,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:58" (2/3) ... [2021-11-12 22:42:03,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289ccbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:42:03, skipping insertion in model container [2021-11-12 22:42:03,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:42:03" (3/3) ... [2021-11-12 22:42:03,336 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2021-11-12 22:42:03,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:42:03,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:42:03,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:42:03,441 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:42:03,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:42:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 432 states have (on average 1.6944444444444444) internal successors, (732), 450 states have internal predecessors, (732), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 22:42:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:42:03,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:03,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:03,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:03,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1881157288, now seen corresponding path program 1 times [2021-11-12 22:42:03,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:03,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718863515] [2021-11-12 22:42:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:03,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:03,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:03,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:42:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:42:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:04,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:04,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:04,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718863515] [2021-11-12 22:42:04,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718863515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:04,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:04,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:42:04,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099190880] [2021-11-12 22:42:04,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:04,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:42:04,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:04,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:42:04,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:42:04,985 INFO L87 Difference]: Start difference. First operand has 555 states, 432 states have (on average 1.6944444444444444) internal successors, (732), 450 states have internal predecessors, (732), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:05,342 INFO L93 Difference]: Finished difference Result 1113 states and 1877 transitions. [2021-11-12 22:42:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:42:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 85 [2021-11-12 22:42:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:05,371 INFO L225 Difference]: With dead ends: 1113 [2021-11-12 22:42:05,372 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 22:42:05,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:05,389 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 119 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 6268 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.52ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:05,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 6268 Invalid, 111 Unknown, 0 Unchecked, 24.52ms Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 199.68ms Time] [2021-11-12 22:42:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 22:42:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 558. [2021-11-12 22:42:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 435 states have (on average 1.6850574712643678) internal successors, (733), 453 states have internal predecessors, (733), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (98), 94 states have call predecessors, (98), 96 states have call successors, (98) [2021-11-12 22:42:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 930 transitions. [2021-11-12 22:42:05,551 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 930 transitions. Word has length 85 [2021-11-12 22:42:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:05,552 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 930 transitions. [2021-11-12 22:42:05,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 930 transitions. [2021-11-12 22:42:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:42:05,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:05,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:05,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:05,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:05,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 782189340, now seen corresponding path program 1 times [2021-11-12 22:42:05,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:05,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648134137] [2021-11-12 22:42:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:05,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:05,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:05,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:42:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:42:06,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:06,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:07,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:07,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648134137] [2021-11-12 22:42:07,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648134137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:07,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:07,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:42:07,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504896356] [2021-11-12 22:42:07,019 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:07,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:42:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:42:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:42:07,025 INFO L87 Difference]: Start difference. First operand 558 states and 930 transitions. Second operand has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:07,281 INFO L93 Difference]: Finished difference Result 1121 states and 1878 transitions. [2021-11-12 22:42:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:42:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 86 [2021-11-12 22:42:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:07,289 INFO L225 Difference]: With dead ends: 1121 [2021-11-12 22:42:07,289 INFO L226 Difference]: Without dead ends: 579 [2021-11-12 22:42:07,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:07,295 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 176 mSDsluCounter, 4437 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5348 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.67ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:07,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5348 Invalid, 98 Unknown, 0 Unchecked, 12.67ms Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 163.97ms Time] [2021-11-12 22:42:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-12 22:42:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 571. [2021-11-12 22:42:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 445 states have (on average 1.6808988764044943) internal successors, (748), 465 states have internal predecessors, (748), 100 states have call successors, (100), 23 states have call predecessors, (100), 25 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-12 22:42:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 949 transitions. [2021-11-12 22:42:07,334 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 949 transitions. Word has length 86 [2021-11-12 22:42:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:07,335 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 949 transitions. [2021-11-12 22:42:07,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 949 transitions. [2021-11-12 22:42:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:42:07,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:07,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:07,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:07,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:07,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1718384564, now seen corresponding path program 1 times [2021-11-12 22:42:07,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:07,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174742431] [2021-11-12 22:42:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:07,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:07,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:07,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:07,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:42:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:42:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:08,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:08,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:08,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174742431] [2021-11-12 22:42:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174742431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:08,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:08,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:42:08,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158641578] [2021-11-12 22:42:08,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:08,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:42:08,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:42:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:42:08,728 INFO L87 Difference]: Start difference. First operand 571 states and 949 transitions. Second operand has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:09,032 INFO L93 Difference]: Finished difference Result 1147 states and 1917 transitions. [2021-11-12 22:42:09,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:42:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 87 [2021-11-12 22:42:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:09,039 INFO L225 Difference]: With dead ends: 1147 [2021-11-12 22:42:09,039 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:42:09,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:09,045 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 104 mSDsluCounter, 5341 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6251 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.65ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:09,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6251 Invalid, 115 Unknown, 0 Unchecked, 14.65ms Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 202.15ms Time] [2021-11-12 22:42:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:42:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 584. [2021-11-12 22:42:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 455 states have (on average 1.676923076923077) internal successors, (763), 477 states have internal predecessors, (763), 101 states have call successors, (101), 23 states have call predecessors, (101), 27 states have return successors, (104), 96 states have call predecessors, (104), 98 states have call successors, (104) [2021-11-12 22:42:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 968 transitions. [2021-11-12 22:42:09,080 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 968 transitions. Word has length 87 [2021-11-12 22:42:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 968 transitions. [2021-11-12 22:42:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 968 transitions. [2021-11-12 22:42:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:42:09,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:09,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:09,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:09,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:09,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash -65751743, now seen corresponding path program 1 times [2021-11-12 22:42:09,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:09,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716058768] [2021-11-12 22:42:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:09,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:09,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:09,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:42:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:09,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:42:09,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:10,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:10,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:10,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716058768] [2021-11-12 22:42:10,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716058768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:10,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:10,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:42:10,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719632948] [2021-11-12 22:42:10,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:10,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:42:10,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:42:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:42:10,505 INFO L87 Difference]: Start difference. First operand 584 states and 968 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:42:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:10,716 INFO L93 Difference]: Finished difference Result 1167 states and 1947 transitions. [2021-11-12 22:42:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:42:10,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2021-11-12 22:42:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:10,723 INFO L225 Difference]: With dead ends: 1167 [2021-11-12 22:42:10,724 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 22:42:10,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:10,729 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 150 mSDsluCounter, 5182 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6080 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.34ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:10,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6080 Invalid, 85 Unknown, 0 Unchecked, 13.34ms Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 137.55ms Time] [2021-11-12 22:42:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 22:42:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2021-11-12 22:42:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 465 states have (on average 1.6731182795698925) internal successors, (778), 489 states have internal predecessors, (778), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-12 22:42:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 990 transitions. [2021-11-12 22:42:10,763 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 990 transitions. Word has length 88 [2021-11-12 22:42:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:10,763 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 990 transitions. [2021-11-12 22:42:10,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:42:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 990 transitions. [2021-11-12 22:42:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:42:10,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:10,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:10,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:10,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:10,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1748381200, now seen corresponding path program 1 times [2021-11-12 22:42:10,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:10,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485332058] [2021-11-12 22:42:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:10,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:10,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:10,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:42:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:11,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:42:11,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:11,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:12,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:12,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485332058] [2021-11-12 22:42:12,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485332058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:12,189 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:12,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:42:12,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916368568] [2021-11-12 22:42:12,189 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:12,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:42:12,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:42:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:42:12,190 INFO L87 Difference]: Start difference. First operand 597 states and 990 transitions. Second operand has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:12,557 INFO L93 Difference]: Finished difference Result 1190 states and 1983 transitions. [2021-11-12 22:42:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:42:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 89 [2021-11-12 22:42:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:12,565 INFO L225 Difference]: With dead ends: 1190 [2021-11-12 22:42:12,565 INFO L226 Difference]: Without dead ends: 603 [2021-11-12 22:42:12,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:42:12,573 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 124 mSDsluCounter, 6078 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 6968 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.27ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:12,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 6968 Invalid, 167 Unknown, 0 Unchecked, 14.27ms Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 242.47ms Time] [2021-11-12 22:42:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-12 22:42:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 593. [2021-11-12 22:42:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 461 states have (on average 1.6637744034707158) internal successors, (767), 485 states have internal predecessors, (767), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-12 22:42:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 979 transitions. [2021-11-12 22:42:12,611 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 979 transitions. Word has length 89 [2021-11-12 22:42:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:12,611 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 979 transitions. [2021-11-12 22:42:12,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 979 transitions. [2021-11-12 22:42:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:42:12,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:12,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:12,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:12,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:12,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1984002400, now seen corresponding path program 1 times [2021-11-12 22:42:12,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:12,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348733059] [2021-11-12 22:42:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:12,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:12,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:12,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:42:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:42:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:13,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:13,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:13,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348733059] [2021-11-12 22:42:13,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348733059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:13,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:13,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:42:13,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983659519] [2021-11-12 22:42:13,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:13,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:13,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:42:13,826 INFO L87 Difference]: Start difference. First operand 593 states and 979 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:42:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:13,919 INFO L93 Difference]: Finished difference Result 1162 states and 1924 transitions. [2021-11-12 22:42:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:42:13,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-12 22:42:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:13,924 INFO L225 Difference]: With dead ends: 1162 [2021-11-12 22:42:13,924 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 22:42:13,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:13,933 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 19 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:13,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3585 Invalid, 21 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 25.82ms Time] [2021-11-12 22:42:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 22:42:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 22:42:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.648989898989899) internal successors, (653), 412 states have internal predecessors, (653), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:42:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 846 transitions. [2021-11-12 22:42:13,964 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 846 transitions. Word has length 89 [2021-11-12 22:42:13,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:13,965 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 846 transitions. [2021-11-12 22:42:13,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:42:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 846 transitions. [2021-11-12 22:42:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:42:13,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:13,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:13,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:14,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:14,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -864765152, now seen corresponding path program 1 times [2021-11-12 22:42:14,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:14,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324300285] [2021-11-12 22:42:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:14,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:14,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:14,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:42:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:14,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:42:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:14,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:15,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:15,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324300285] [2021-11-12 22:42:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324300285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:15,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:15,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:42:15,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35383679] [2021-11-12 22:42:15,455 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:42:15,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:42:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:42:15,457 INFO L87 Difference]: Start difference. First operand 516 states and 846 transitions. Second operand has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:15,677 INFO L93 Difference]: Finished difference Result 1019 states and 1680 transitions. [2021-11-12 22:42:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:42:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 90 [2021-11-12 22:42:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:15,689 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 22:42:15,689 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 22:42:15,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:42:15,696 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 63 mSDsluCounter, 7426 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 8255 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:15,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 8255 Invalid, 139 Unknown, 0 Unchecked, 12.02ms Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 123.41ms Time] [2021-11-12 22:42:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 22:42:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 22:42:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.6464646464646464) internal successors, (652), 412 states have internal predecessors, (652), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:42:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 845 transitions. [2021-11-12 22:42:15,723 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 845 transitions. Word has length 90 [2021-11-12 22:42:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:15,723 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 845 transitions. [2021-11-12 22:42:15,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 845 transitions. [2021-11-12 22:42:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 22:42:15,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:15,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:15,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:15,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:15,943 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -385145611, now seen corresponding path program 1 times [2021-11-12 22:42:15,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:15,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89646990] [2021-11-12 22:42:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:15,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:15,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:15,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:15,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:42:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:42:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:16,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:17,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:17,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89646990] [2021-11-12 22:42:17,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89646990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:17,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:17,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:42:17,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448783346] [2021-11-12 22:42:17,192 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:17,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:42:17,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:42:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:42:17,193 INFO L87 Difference]: Start difference. First operand 516 states and 845 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:17,416 INFO L93 Difference]: Finished difference Result 1019 states and 1678 transitions. [2021-11-12 22:42:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:42:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 91 [2021-11-12 22:42:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:17,423 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 22:42:17,424 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 22:42:17,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:42:17,428 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 69 mSDsluCounter, 6602 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 7431 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:17,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 7431 Invalid, 123 Unknown, 0 Unchecked, 10.43ms Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 130.33ms Time] [2021-11-12 22:42:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 22:42:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 22:42:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.643939393939394) internal successors, (651), 412 states have internal predecessors, (651), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:42:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 844 transitions. [2021-11-12 22:42:17,454 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 844 transitions. Word has length 91 [2021-11-12 22:42:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 844 transitions. [2021-11-12 22:42:17,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 844 transitions. [2021-11-12 22:42:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:42:17,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:17,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:17,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:17,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:17,675 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash 455484101, now seen corresponding path program 1 times [2021-11-12 22:42:17,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:17,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914255268] [2021-11-12 22:42:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:17,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:17,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:17,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:42:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:42:18,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:18,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:18,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:18,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914255268] [2021-11-12 22:42:18,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914255268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:18,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:18,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:42:18,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057539450] [2021-11-12 22:42:18,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:18,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:42:18,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:42:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:42:18,975 INFO L87 Difference]: Start difference. First operand 516 states and 844 transitions. Second operand has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:19,187 INFO L93 Difference]: Finished difference Result 1019 states and 1676 transitions. [2021-11-12 22:42:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:42:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 92 [2021-11-12 22:42:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:19,193 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 22:42:19,193 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 22:42:19,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:42:19,200 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 33 mSDsluCounter, 7412 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 8241 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:19,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 8241 Invalid, 115 Unknown, 0 Unchecked, 11.46ms Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 129.57ms Time] [2021-11-12 22:42:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 22:42:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 22:42:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 396 states have (on average 1.6414141414141414) internal successors, (650), 412 states have internal predecessors, (650), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:42:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 843 transitions. [2021-11-12 22:42:19,225 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 843 transitions. Word has length 92 [2021-11-12 22:42:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:19,226 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 843 transitions. [2021-11-12 22:42:19,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:42:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 843 transitions. [2021-11-12 22:42:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:42:19,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:19,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:19,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:19,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:19,448 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -397472774, now seen corresponding path program 1 times [2021-11-12 22:42:19,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:19,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346848495] [2021-11-12 22:42:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:19,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:19,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:19,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:42:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:42:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:42:20,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:20,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:20,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346848495] [2021-11-12 22:42:20,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346848495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:20,425 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:20,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:42:20,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382119804] [2021-11-12 22:42:20,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:20,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:42:20,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:20,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:42:20,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:42:20,427 INFO L87 Difference]: Start difference. First operand 516 states and 843 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:42:22,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:25,167 INFO L93 Difference]: Finished difference Result 2097 states and 3493 transitions. [2021-11-12 22:42:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:42:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 93 [2021-11-12 22:42:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:25,185 INFO L225 Difference]: With dead ends: 2097 [2021-11-12 22:42:25,185 INFO L226 Difference]: Without dead ends: 1599 [2021-11-12 22:42:25,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:42:25,195 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 2153 mSDsluCounter, 4880 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 538 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4038.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2215 SdHoareTripleChecker+Valid, 5907 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.26ms SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4419.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:25,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2215 Valid, 5907 Invalid, 1488 Unknown, 0 Unchecked, 35.26ms Time], IncrementalHoareTripleChecker [538 Valid, 949 Invalid, 1 Unknown, 0 Unchecked, 4419.00ms Time] [2021-11-12 22:42:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-12 22:42:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1432. [2021-11-12 22:42:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1101 states have (on average 1.6058128973660308) internal successors, (1768), 1147 states have internal predecessors, (1768), 270 states have call successors, (270), 63 states have call predecessors, (270), 60 states have return successors, (276), 258 states have call predecessors, (276), 265 states have call successors, (276) [2021-11-12 22:42:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2314 transitions. [2021-11-12 22:42:25,287 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2314 transitions. Word has length 93 [2021-11-12 22:42:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:25,288 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2314 transitions. [2021-11-12 22:42:25,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:42:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2314 transitions. [2021-11-12 22:42:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:42:25,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:25,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:25,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:25,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:25,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash 204066973, now seen corresponding path program 1 times [2021-11-12 22:42:25,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:25,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36090377] [2021-11-12 22:42:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:25,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:25,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:25,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:42:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:42:26,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:42:26,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:42:26,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:26,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36090377] [2021-11-12 22:42:26,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36090377] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:42:26,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:42:26,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:42:26,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995374930] [2021-11-12 22:42:26,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:26,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:42:26,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:26,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:42:26,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:42:26,657 INFO L87 Difference]: Start difference. First operand 1432 states and 2314 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:42:28,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:29,828 INFO L93 Difference]: Finished difference Result 3831 states and 6293 transitions. [2021-11-12 22:42:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:42:29,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 98 [2021-11-12 22:42:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:29,852 INFO L225 Difference]: With dead ends: 3831 [2021-11-12 22:42:29,852 INFO L226 Difference]: Without dead ends: 2417 [2021-11-12 22:42:29,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:29,866 INFO L933 BasicCegarLoop]: 1058 mSDtfsCounter, 829 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 130 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2829.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.06ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2990.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:29,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 4893 Invalid, 466 Unknown, 0 Unchecked, 16.06ms Time], IncrementalHoareTripleChecker [130 Valid, 335 Invalid, 1 Unknown, 0 Unchecked, 2990.14ms Time] [2021-11-12 22:42:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-11-12 22:42:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2407. [2021-11-12 22:42:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 1849 states have (on average 1.613304488912926) internal successors, (2983), 1927 states have internal predecessors, (2983), 452 states have call successors, (452), 102 states have call predecessors, (452), 105 states have return successors, (502), 439 states have call predecessors, (502), 445 states have call successors, (502) [2021-11-12 22:42:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3937 transitions. [2021-11-12 22:42:29,996 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3937 transitions. Word has length 98 [2021-11-12 22:42:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:29,997 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3937 transitions. [2021-11-12 22:42:29,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:42:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3937 transitions. [2021-11-12 22:42:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:42:30,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:30,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:30,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:30,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:30,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1972797999, now seen corresponding path program 1 times [2021-11-12 22:42:30,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:30,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677111396] [2021-11-12 22:42:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:30,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:30,219 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:30,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:42:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:30,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:42:30,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:42:31,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:31,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:31,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677111396] [2021-11-12 22:42:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677111396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:31,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:31,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:42:31,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612874398] [2021-11-12 22:42:31,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:31,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:42:31,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:42:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:42:31,430 INFO L87 Difference]: Start difference. First operand 2407 states and 3937 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:42:33,464 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:35,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:38,681 INFO L93 Difference]: Finished difference Result 8699 states and 14986 transitions. [2021-11-12 22:42:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:42:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 101 [2021-11-12 22:42:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:38,763 INFO L225 Difference]: With dead ends: 8699 [2021-11-12 22:42:38,764 INFO L226 Difference]: Without dead ends: 6310 [2021-11-12 22:42:38,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:38,792 INFO L933 BasicCegarLoop]: 1279 mSDtfsCounter, 1135 mSDsluCounter, 5213 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6413.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 6492 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.85ms SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6741.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:38,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 6492 Invalid, 1065 Unknown, 0 Unchecked, 31.85ms Time], IncrementalHoareTripleChecker [98 Valid, 965 Invalid, 2 Unknown, 0 Unchecked, 6741.81ms Time] [2021-11-12 22:42:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2021-11-12 22:42:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 4738. [2021-11-12 22:42:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 3645 states have (on average 1.6085048010973937) internal successors, (5863), 3804 states have internal predecessors, (5863), 874 states have call successors, (874), 201 states have call predecessors, (874), 218 states have return successors, (1168), 856 states have call predecessors, (1168), 862 states have call successors, (1168) [2021-11-12 22:42:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 7905 transitions. [2021-11-12 22:42:39,256 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 7905 transitions. Word has length 101 [2021-11-12 22:42:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:39,256 INFO L470 AbstractCegarLoop]: Abstraction has 4738 states and 7905 transitions. [2021-11-12 22:42:39,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:42:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 7905 transitions. [2021-11-12 22:42:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:42:39,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:39,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:39,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:39,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:39,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash -226788623, now seen corresponding path program 1 times [2021-11-12 22:42:39,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:39,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875190016] [2021-11-12 22:42:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:39,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:39,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:39,485 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:39,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:42:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:42:40,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:42:40,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:42:40,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:40,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875190016] [2021-11-12 22:42:40,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875190016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:40,811 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:40,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:42:40,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521980320] [2021-11-12 22:42:40,812 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:40,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:40,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:42:40,816 INFO L87 Difference]: Start difference. First operand 4738 states and 7905 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:42:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:41,311 INFO L93 Difference]: Finished difference Result 9488 states and 16032 transitions. [2021-11-12 22:42:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:42:41,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2021-11-12 22:42:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:41,372 INFO L225 Difference]: With dead ends: 9488 [2021-11-12 22:42:41,372 INFO L226 Difference]: Without dead ends: 4768 [2021-11-12 22:42:41,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:41,419 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 30 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.50ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:41,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1633 Invalid, 67 Unknown, 0 Unchecked, 4.50ms Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 95.01ms Time] [2021-11-12 22:42:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-11-12 22:42:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4758. [2021-11-12 22:42:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 3660 states have (on average 1.6046448087431695) internal successors, (5873), 3819 states have internal predecessors, (5873), 874 states have call successors, (874), 211 states have call predecessors, (874), 223 states have return successors, (1141), 851 states have call predecessors, (1141), 862 states have call successors, (1141) [2021-11-12 22:42:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7888 transitions. [2021-11-12 22:42:41,900 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7888 transitions. Word has length 102 [2021-11-12 22:42:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:41,901 INFO L470 AbstractCegarLoop]: Abstraction has 4758 states and 7888 transitions. [2021-11-12 22:42:41,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:42:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7888 transitions. [2021-11-12 22:42:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 22:42:41,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:41,909 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:41,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:42,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:42,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -468332789, now seen corresponding path program 1 times [2021-11-12 22:42:42,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:42,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441020760] [2021-11-12 22:42:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:42,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:42,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:42,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:42,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:42:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:42,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:42:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:42:43,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:42:43,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:43,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441020760] [2021-11-12 22:42:43,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441020760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:43,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:43,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:42:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067622639] [2021-11-12 22:42:43,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:42:43,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:43,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:42:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:42:43,431 INFO L87 Difference]: Start difference. First operand 4758 states and 7888 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:42:45,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:49,170 INFO L93 Difference]: Finished difference Result 17410 states and 30875 transitions. [2021-11-12 22:42:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:42:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 110 [2021-11-12 22:42:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:49,427 INFO L225 Difference]: With dead ends: 17410 [2021-11-12 22:42:49,428 INFO L226 Difference]: Without dead ends: 12670 [2021-11-12 22:42:49,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:49,479 INFO L933 BasicCegarLoop]: 1286 mSDtfsCounter, 1092 mSDsluCounter, 5262 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4396.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 6548 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.01ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4726.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 6548 Invalid, 1052 Unknown, 0 Unchecked, 35.01ms Time], IncrementalHoareTripleChecker [89 Valid, 962 Invalid, 1 Unknown, 0 Unchecked, 4726.55ms Time] [2021-11-12 22:42:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12670 states. [2021-11-12 22:42:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12670 to 9490. [2021-11-12 22:42:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9490 states, 7302 states have (on average 1.5999726102437688) internal successors, (11683), 7628 states have internal predecessors, (11683), 1723 states have call successors, (1723), 419 states have call predecessors, (1723), 464 states have return successors, (2700), 1690 states have call predecessors, (2700), 1701 states have call successors, (2700) [2021-11-12 22:42:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9490 states to 9490 states and 16106 transitions. [2021-11-12 22:42:50,522 INFO L78 Accepts]: Start accepts. Automaton has 9490 states and 16106 transitions. Word has length 110 [2021-11-12 22:42:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:50,523 INFO L470 AbstractCegarLoop]: Abstraction has 9490 states and 16106 transitions. [2021-11-12 22:42:50,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:42:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 9490 states and 16106 transitions. [2021-11-12 22:42:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:42:50,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:50,527 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:50,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:50,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:50,764 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:50,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1224110669, now seen corresponding path program 1 times [2021-11-12 22:42:50,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:50,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997050886] [2021-11-12 22:42:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:50,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:50,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:50,767 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:50,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:42:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:42:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:42:51,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:42:51,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:51,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997050886] [2021-11-12 22:42:51,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997050886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:51,907 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:51,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:42:51,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177251383] [2021-11-12 22:42:51,908 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:51,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:51,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:42:51,910 INFO L87 Difference]: Start difference. First operand 9490 states and 16106 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:52,831 INFO L93 Difference]: Finished difference Result 19082 states and 32909 transitions. [2021-11-12 22:42:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:42:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 111 [2021-11-12 22:42:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:52,936 INFO L225 Difference]: With dead ends: 19082 [2021-11-12 22:42:52,936 INFO L226 Difference]: Without dead ends: 9610 [2021-11-12 22:42:53,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:53,043 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 27 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.88ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:53,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2440 Invalid, 72 Unknown, 0 Unchecked, 5.88ms Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 116.53ms Time] [2021-11-12 22:42:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2021-11-12 22:42:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 9590. [2021-11-12 22:42:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 7392 states have (on average 1.5940205627705628) internal successors, (11783), 7698 states have internal predecessors, (11783), 1723 states have call successors, (1723), 459 states have call predecessors, (1723), 474 states have return successors, (2658), 1680 states have call predecessors, (2658), 1701 states have call successors, (2658) [2021-11-12 22:42:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 16164 transitions. [2021-11-12 22:42:53,836 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 16164 transitions. Word has length 111 [2021-11-12 22:42:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:53,836 INFO L470 AbstractCegarLoop]: Abstraction has 9590 states and 16164 transitions. [2021-11-12 22:42:53,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 16164 transitions. [2021-11-12 22:42:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:42:53,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:53,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:42:53,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:54,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:54,060 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -902491661, now seen corresponding path program 1 times [2021-11-12 22:42:54,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:54,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181131209] [2021-11-12 22:42:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:54,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:54,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:54,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:42:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:42:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:42:55,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:42:55,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:55,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181131209] [2021-11-12 22:42:55,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181131209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:55,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:55,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:42:55,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978876936] [2021-11-12 22:42:55,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:42:55,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:42:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:42:55,364 INFO L87 Difference]: Start difference. First operand 9590 states and 16164 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 22:42:57,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:01,265 INFO L93 Difference]: Finished difference Result 35010 states and 64612 transitions. [2021-11-12 22:43:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:43:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 120 [2021-11-12 22:43:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:01,510 INFO L225 Difference]: With dead ends: 35010 [2021-11-12 22:43:01,511 INFO L226 Difference]: Without dead ends: 25438 [2021-11-12 22:43:01,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:43:01,628 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 1082 mSDsluCounter, 4354 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3514.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 5644 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.70ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3785.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:01,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 5644 Invalid, 638 Unknown, 0 Unchecked, 24.70ms Time], IncrementalHoareTripleChecker [88 Valid, 549 Invalid, 1 Unknown, 0 Unchecked, 3785.09ms Time] [2021-11-12 22:43:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25438 states. [2021-11-12 22:43:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25438 to 19234. [2021-11-12 22:43:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19234 states, 14821 states have (on average 1.5889616085284395) internal successors, (23550), 15451 states have internal predecessors, (23550), 3426 states have call successors, (3426), 915 states have call predecessors, (3426), 986 states have return successors, (6473), 3363 states have call predecessors, (6473), 3384 states have call successors, (6473) [2021-11-12 22:43:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19234 states to 19234 states and 33449 transitions. [2021-11-12 22:43:03,909 INFO L78 Accepts]: Start accepts. Automaton has 19234 states and 33449 transitions. Word has length 120 [2021-11-12 22:43:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:03,910 INFO L470 AbstractCegarLoop]: Abstraction has 19234 states and 33449 transitions. [2021-11-12 22:43:03,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 22:43:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19234 states and 33449 transitions. [2021-11-12 22:43:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:43:03,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:03,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:03,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-12 22:43:04,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:04,127 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash 466629917, now seen corresponding path program 1 times [2021-11-12 22:43:04,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:04,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094175642] [2021-11-12 22:43:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:04,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:04,130 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:04,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:43:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:43:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:43:04,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:43:05,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:05,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094175642] [2021-11-12 22:43:05,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094175642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:05,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:05,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:43:05,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679178970] [2021-11-12 22:43:05,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:43:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:43:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:43:05,274 INFO L87 Difference]: Start difference. First operand 19234 states and 33449 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:43:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:06,832 INFO L93 Difference]: Finished difference Result 38690 states and 68921 transitions. [2021-11-12 22:43:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:43:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 121 [2021-11-12 22:43:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:06,995 INFO L225 Difference]: With dead ends: 38690 [2021-11-12 22:43:06,995 INFO L226 Difference]: Without dead ends: 19474 [2021-11-12 22:43:07,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:43:07,678 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 27 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:07,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2440 Invalid, 74 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 94.11ms Time] [2021-11-12 22:43:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19474 states. [2021-11-12 22:43:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19474 to 19434. [2021-11-12 22:43:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19434 states, 15001 states have (on average 1.5832277848143457) internal successors, (23750), 15631 states have internal predecessors, (23750), 3426 states have call successors, (3426), 955 states have call predecessors, (3426), 1006 states have return successors, (6413), 3343 states have call predecessors, (6413), 3384 states have call successors, (6413) [2021-11-12 22:43:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19434 states to 19434 states and 33589 transitions. [2021-11-12 22:43:09,330 INFO L78 Accepts]: Start accepts. Automaton has 19434 states and 33589 transitions. Word has length 121 [2021-11-12 22:43:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:09,330 INFO L470 AbstractCegarLoop]: Abstraction has 19434 states and 33589 transitions. [2021-11-12 22:43:09,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:43:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 19434 states and 33589 transitions. [2021-11-12 22:43:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:43:09,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:09,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:09,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:09,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:09,555 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:09,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1042938137, now seen corresponding path program 1 times [2021-11-12 22:43:09,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:09,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613431788] [2021-11-12 22:43:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:09,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:09,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:09,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:43:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:10,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:43:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:43:10,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:43:10,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:10,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613431788] [2021-11-12 22:43:10,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613431788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:10,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:43:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861941782] [2021-11-12 22:43:10,967 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:10,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:43:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:43:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:43:10,970 INFO L87 Difference]: Start difference. First operand 19434 states and 33589 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 22:43:12,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:15,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:20,248 INFO L93 Difference]: Finished difference Result 70602 states and 138638 transitions. [2021-11-12 22:43:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:43:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 131 [2021-11-12 22:43:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:20,840 INFO L225 Difference]: With dead ends: 70602 [2021-11-12 22:43:20,840 INFO L226 Difference]: Without dead ends: 51186 [2021-11-12 22:43:21,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:43:21,161 INFO L933 BasicCegarLoop]: 1137 mSDtfsCounter, 1138 mSDsluCounter, 4836 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 141 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5492.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 5973 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.09ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5734.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:21,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 5973 Invalid, 961 Unknown, 0 Unchecked, 18.09ms Time], IncrementalHoareTripleChecker [141 Valid, 818 Invalid, 2 Unknown, 0 Unchecked, 5734.19ms Time] [2021-11-12 22:43:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51186 states. [2021-11-12 22:43:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51186 to 39062. [2021-11-12 22:43:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39062 states, 30134 states have (on average 1.5783168513970929) internal successors, (47561), 31432 states have internal predecessors, (47561), 6837 states have call successors, (6837), 1907 states have call predecessors, (6837), 2090 states have return successors, (16336), 6714 states have call predecessors, (16336), 6755 states have call successors, (16336) [2021-11-12 22:43:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39062 states to 39062 states and 70734 transitions. [2021-11-12 22:43:25,183 INFO L78 Accepts]: Start accepts. Automaton has 39062 states and 70734 transitions. Word has length 131 [2021-11-12 22:43:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:25,192 INFO L470 AbstractCegarLoop]: Abstraction has 39062 states and 70734 transitions. [2021-11-12 22:43:25,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 22:43:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 39062 states and 70734 transitions. [2021-11-12 22:43:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:43:25,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:25,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:25,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:25,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:25,412 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1711180495, now seen corresponding path program 1 times [2021-11-12 22:43:25,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:25,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997994137] [2021-11-12 22:43:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:25,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:25,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:25,414 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:25,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:43:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:43:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:43:26,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:43:26,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:26,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997994137] [2021-11-12 22:43:26,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997994137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:26,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:26,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:43:26,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532006563] [2021-11-12 22:43:26,475 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:26,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:43:26,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:43:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:43:26,477 INFO L87 Difference]: Start difference. First operand 39062 states and 70734 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 22:43:28,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:30,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:32,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:34,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:40,797 INFO L93 Difference]: Finished difference Result 86100 states and 164983 transitions. [2021-11-12 22:43:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:43:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 132 [2021-11-12 22:43:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:41,400 INFO L225 Difference]: With dead ends: 86100 [2021-11-12 22:43:41,401 INFO L226 Difference]: Without dead ends: 47056 [2021-11-12 22:43:41,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:43:41,876 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 1691 mSDsluCounter, 3983 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 128 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10641.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 5233 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.94ms SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11028.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:41,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 5233 Invalid, 2349 Unknown, 0 Unchecked, 14.94ms Time], IncrementalHoareTripleChecker [128 Valid, 2217 Invalid, 4 Unknown, 0 Unchecked, 11028.87ms Time] [2021-11-12 22:43:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47056 states. [2021-11-12 22:43:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47056 to 42334. [2021-11-12 22:43:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42334 states, 32754 states have (on average 1.582860108689015) internal successors, (51845), 34144 states have internal predecessors, (51845), 7205 states have call successors, (7205), 2179 states have call predecessors, (7205), 2374 states have return successors, (17936), 7002 states have call predecessors, (17936), 7123 states have call successors, (17936) [2021-11-12 22:43:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42334 states to 42334 states and 76986 transitions. [2021-11-12 22:43:45,422 INFO L78 Accepts]: Start accepts. Automaton has 42334 states and 76986 transitions. Word has length 132 [2021-11-12 22:43:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:45,423 INFO L470 AbstractCegarLoop]: Abstraction has 42334 states and 76986 transitions. [2021-11-12 22:43:45,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 22:43:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42334 states and 76986 transitions. [2021-11-12 22:43:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:43:45,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:45,426 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:45,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:45,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:45,646 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 257938409, now seen corresponding path program 1 times [2021-11-12 22:43:45,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:45,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915011857] [2021-11-12 22:43:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:45,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:45,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:45,649 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:45,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:43:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:43:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:43:46,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:43:46,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:46,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915011857] [2021-11-12 22:43:46,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915011857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:46,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:46,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:43:46,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759627236] [2021-11-12 22:43:46,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:46,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:43:46,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:43:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:43:46,774 INFO L87 Difference]: Start difference. First operand 42334 states and 76986 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:43:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:50,675 INFO L93 Difference]: Finished difference Result 87282 states and 165749 transitions. [2021-11-12 22:43:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:43:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 136 [2021-11-12 22:43:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:51,223 INFO L225 Difference]: With dead ends: 87282 [2021-11-12 22:43:51,224 INFO L226 Difference]: Without dead ends: 50802 [2021-11-12 22:43:51,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:43:51,601 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 324 mSDsluCounter, 2542 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.16ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 293.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:51,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 3452 Invalid, 194 Unknown, 0 Unchecked, 4.16ms Time], IncrementalHoareTripleChecker [137 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 293.72ms Time] [2021-11-12 22:43:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50802 states. [2021-11-12 22:43:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50802 to 42854. [2021-11-12 22:43:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42854 states, 33184 states have (on average 1.5789235776277724) internal successors, (52395), 34574 states have internal predecessors, (52395), 7265 states have call successors, (7265), 2179 states have call predecessors, (7265), 2404 states have return successors, (18256), 7062 states have call predecessors, (18256), 7183 states have call successors, (18256) [2021-11-12 22:43:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42854 states to 42854 states and 77916 transitions. [2021-11-12 22:43:54,968 INFO L78 Accepts]: Start accepts. Automaton has 42854 states and 77916 transitions. Word has length 136 [2021-11-12 22:43:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:54,969 INFO L470 AbstractCegarLoop]: Abstraction has 42854 states and 77916 transitions. [2021-11-12 22:43:54,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:43:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 42854 states and 77916 transitions. [2021-11-12 22:43:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 22:43:54,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:54,973 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:54,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 22:43:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:55,193 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1523519359, now seen corresponding path program 1 times [2021-11-12 22:43:55,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:55,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359268293] [2021-11-12 22:43:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:55,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:55,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:55,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6542c0da-4e3c-44f9-a91d-c269220bf114/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:43:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:43:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:43:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:43:56,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:56,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359268293] [2021-11-12 22:43:56,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359268293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:56,340 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:56,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:43:56,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025314925] [2021-11-12 22:43:56,340 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:56,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:43:56,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:43:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:43:56,342 INFO L87 Difference]: Start difference. First operand 42854 states and 77916 transitions. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 8 states have internal predecessors, (155), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 22:43:58,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []