./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.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_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/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_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/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_c19a0563-9e2c-400d-8262-c31fa94a9174/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:58,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:58,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:58,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:58,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:58,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:58,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:58,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:58,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:58,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:58,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:58,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:58,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:58,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:58,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:58,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:58,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:58,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:58,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:58,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:58,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:58,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:58,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:58,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:58,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:58,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:58,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:58,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:58,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:58,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:58,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:58,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:58,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:58,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:58,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:58,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:58,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:58,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:58,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:58,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:58,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:58,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:31:58,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:58,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:58,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:58,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:58,855 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:58,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:58,855 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:58,856 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:31:58,856 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:58,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:58,856 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:31:58,857 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:31:58,857 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:58,857 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:31:58,858 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:31:58,858 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:31:58,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:58,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:58,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:31:58,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:58,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:58,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:58,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:58,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:58,861 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:58,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:58,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:58,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:58,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:58,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:58,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:58,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:58,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:58,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:58,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:58,864 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:31:58,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:31:58,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:58,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:58,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:58,865 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_c19a0563-9e2c-400d-8262-c31fa94a9174/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-13 01:31:59,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:59,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:59,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:59,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:59,191 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:59,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-13 01:31:59,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/ecf3bf421/861ccbf6ba9141b2b82822be11a24d93/FLAG1145c1135 [2021-11-13 01:32:00,063 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:32:00,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-13 01:32:00,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/ecf3bf421/861ccbf6ba9141b2b82822be11a24d93/FLAG1145c1135 [2021-11-13 01:32:00,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/ecf3bf421/861ccbf6ba9141b2b82822be11a24d93 [2021-11-13 01:32:00,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:32:00,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:32:00,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:00,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:32:00,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:32:00,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:00" (1/1) ... [2021-11-13 01:32:00,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a80e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:00, skipping insertion in model container [2021-11-13 01:32:00,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:00" (1/1) ... [2021-11-13 01:32:00,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:32:00,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:32:00,772 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_c19a0563-9e2c-400d-8262-c31fa94a9174/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-13 01:32:00,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:00,802 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) [2021-11-13 01:32:00,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5faf8a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:00, skipping insertion in model container [2021-11-13 01:32:00,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:00,807 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:32:00,811 INFO L158 Benchmark]: Toolchain (without parser) took 617.60ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 98.3MB in the end (delta: -2.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 01:32:00,813 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 132.1MB. Free memory is still 114.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:32:00,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 609.90ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 98.9MB in the end (delta: -2.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 01:32:00,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 132.1MB. Free memory is still 114.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 609.90ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 98.9MB in the end (delta: -2.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/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_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/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_c19a0563-9e2c-400d-8262-c31fa94a9174/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:32:03,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:32:03,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:32:03,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:32:03,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:32:03,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:32:03,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:32:03,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:32:03,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:32:03,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:32:03,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:32:03,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:32:03,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:32:03,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:32:03,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:32:03,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:32:03,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:32:03,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:32:03,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:32:03,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:32:03,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:32:03,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:32:03,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:32:03,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:32:03,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:32:03,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:32:03,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:32:03,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:32:03,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:32:03,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:32:03,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:32:03,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:32:03,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:32:03,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:32:03,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:32:03,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:32:03,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:32:03,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:32:03,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:32:03,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:32:03,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:32:03,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:32:03,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:32:03,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:32:03,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:32:03,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:32:03,490 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:32:03,491 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:32:03,491 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:32:03,491 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:32:03,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:32:03,492 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:32:03,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:32:03,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:32:03,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:32:03,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:32:03,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:32:03,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:32:03,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:32:03,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:32:03,495 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:32:03,495 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:32:03,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:32:03,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:32:03,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:32:03,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:32:03,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:32:03,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:32:03,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:32:03,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:32:03,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:32:03,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:32:03,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:32:03,498 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:32:03,498 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:03,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:32:03,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:32:03,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:32:03,499 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_c19a0563-9e2c-400d-8262-c31fa94a9174/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-13 01:32:03,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:32:03,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:32:03,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:32:03,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:32:03,948 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:32:03,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-13 01:32:04,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/a72157645/10579a4bf0194d0bab94a149f5449c7e/FLAGb8558d2ea [2021-11-13 01:32:04,976 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:32:04,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-13 01:32:05,034 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/a72157645/10579a4bf0194d0bab94a149f5449c7e/FLAGb8558d2ea [2021-11-13 01:32:05,524 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/data/a72157645/10579a4bf0194d0bab94a149f5449c7e [2021-11-13 01:32:05,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:32:05,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:32:05,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:05,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:32:05,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:32:05,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:05" (1/1) ... [2021-11-13 01:32:05,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e347983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:05, skipping insertion in model container [2021-11-13 01:32:05,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:05" (1/1) ... [2021-11-13 01:32:05,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:32:05,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:32:06,344 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_c19a0563-9e2c-400d-8262-c31fa94a9174/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-13 01:32:06,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:06,406 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:32:06,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:32:06,615 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_c19a0563-9e2c-400d-8262-c31fa94a9174/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-13 01:32:06,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:06,649 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:32:06,763 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_c19a0563-9e2c-400d-8262-c31fa94a9174/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-13 01:32:06,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:06,788 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:32:06,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06 WrapperNode [2021-11-13 01:32:06,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:06,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:32:06,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:32:06,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:32:06,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:06,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:06,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:32:06,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:32:06,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:32:06,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:32:06,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:06,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:06,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:06,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:07,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:07,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:07,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:07,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:32:07,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:32:07,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:32:07,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:32:07,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (1/1) ... [2021-11-13 01:32:07,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:32:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:32:07,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:32:07,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:32:07,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:32:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:32:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:32:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:32:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:32:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:32:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:32:07,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:32:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:32:07,464 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 01:32:17,470 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-13 01:32:17,470 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-13 01:32:17,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:32:17,480 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:32:17,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:32:17 BoogieIcfgContainer [2021-11-13 01:32:17,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:32:17,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:32:17,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:32:17,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:32:17,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:32:05" (1/3) ... [2021-11-13 01:32:17,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f3e292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:32:17, skipping insertion in model container [2021-11-13 01:32:17,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:06" (2/3) ... [2021-11-13 01:32:17,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f3e292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:32:17, skipping insertion in model container [2021-11-13 01:32:17,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:32:17" (3/3) ... [2021-11-13 01:32:17,495 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-11-13 01:32:17,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:32:17,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:32:17,561 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:32:17,569 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 [2021-11-13 01:32:17,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:32:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 01:32:17,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:17,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:17,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-11-13 01:32:17,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:17,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825192117] [2021-11-13 01:32:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:17,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:17,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:17,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:32:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:32:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:18,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 01:32:18,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 01:32:18,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:18,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-13 01:32:18,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:18,465 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-13 01:32:18,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-13 01:32:19,210 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-13 01:32:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-13 01:32:19,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:19,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-13 01:32:19,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:19,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-13 01:32:19,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-13 01:32:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,652 INFO L244 Elim1Store]: Index analysis took 102 ms [2021-11-13 01:32:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-13 01:32:19,844 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-13 01:32:19,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-13 01:32:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:19,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-13 01:32:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-13 01:32:19,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-13 01:32:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:32:20,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:20,396 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-13 01:32:20,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-13 01:32:20,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-13 01:32:20,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-13 01:32:20,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-13 01:32:20,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-13 01:32:20,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-13 01:32:20,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:32:20,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-13 01:32:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:32:21,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:21,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825192117] [2021-11-13 01:32:21,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825192117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:21,221 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:21,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 01:32:21,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678769599] [2021-11-13 01:32:21,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:21,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:32:21,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:32:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:32:21,260 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:23,304 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 [] [2021-11-13 01:32:25,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:29,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:30,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:38,960 INFO L93 Difference]: Finished difference Result 295 states and 495 transitions. [2021-11-13 01:32:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-13 01:32:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:38,975 INFO L225 Difference]: With dead ends: 295 [2021-11-13 01:32:38,981 INFO L226 Difference]: Without dead ends: 134 [2021-11-13 01:32:38,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:38,995 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 18 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17123.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.78ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 17533.79ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:38,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 984 Invalid, 245 Unknown, 0 Unchecked, 9.78ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 2 Unknown, 64 Unchecked, 17533.79ms Time] [2021-11-13 01:32:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-13 01:32:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-13 01:32:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.5263157894736843) internal successors, (203), 133 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2021-11-13 01:32:39,078 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 43 [2021-11-13 01:32:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:39,079 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2021-11-13 01:32:39,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2021-11-13 01:32:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 01:32:39,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:39,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:39,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:39,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:39,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2115802661, now seen corresponding path program 1 times [2021-11-13 01:32:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:39,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275162146] [2021-11-13 01:32:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:39,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:39,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:39,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:39,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:32:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:32:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:39,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:40,269 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:32:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:32:43,794 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:32:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:32:51,969 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:32:51,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:32:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:32:52,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:00,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:00,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275162146] [2021-11-13 01:33:00,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275162146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:00,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:00,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-13 01:33:00,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288316030] [2021-11-13 01:33:00,476 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:00,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:33:00,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:00,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:33:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-13 01:33:00,480 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:02,519 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 [] [2021-11-13 01:33:04,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:09,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:10,231 INFO L93 Difference]: Finished difference Result 273 states and 417 transitions. [2021-11-13 01:33:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:33:10,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-13 01:33:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:10,236 INFO L225 Difference]: With dead ends: 273 [2021-11-13 01:33:10,236 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 01:33:10,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-13 01:33:10,239 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 16 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9484.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 9722.42ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:10,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 564 Invalid, 195 Unknown, 0 Unchecked, 5.09ms Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 106 Unchecked, 9722.42ms Time] [2021-11-13 01:33:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 01:33:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-11-13 01:33:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-11-13 01:33:10,257 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 43 [2021-11-13 01:33:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:10,257 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-11-13 01:33:10,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-11-13 01:33:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 01:33:10,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:10,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:10,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:10,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:10,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -964647941, now seen corresponding path program 1 times [2021-11-13 01:33:10,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:10,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508321722] [2021-11-13 01:33:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:10,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:10,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:10,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:33:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:33:11,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:11,554 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:33:11,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:33:14,997 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:33:14,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:33:22,441 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:33:22,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:33:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:22,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:23,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:23,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508321722] [2021-11-13 01:33:23,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508321722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:23,025 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:23,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:33:23,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807634049] [2021-11-13 01:33:23,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:23,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:33:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:33:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:33:23,028 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:25,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:28,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:28,642 INFO L93 Difference]: Finished difference Result 302 states and 464 transitions. [2021-11-13 01:33:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:33:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-13 01:33:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:28,647 INFO L225 Difference]: With dead ends: 302 [2021-11-13 01:33:28,647 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 01:33:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:33:28,651 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 41 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5433.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.00ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 5593.98ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:28,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 528 Invalid, 161 Unknown, 0 Unchecked, 3.00ms Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 1 Unknown, 49 Unchecked, 5593.98ms Time] [2021-11-13 01:33:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 01:33:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2021-11-13 01:33:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.54375) internal successors, (247), 160 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2021-11-13 01:33:28,669 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 56 [2021-11-13 01:33:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:28,670 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2021-11-13 01:33:28,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2021-11-13 01:33:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:33:28,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:28,674 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] [2021-11-13 01:33:28,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:28,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:28,890 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash 370114448, now seen corresponding path program 1 times [2021-11-13 01:33:28,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:28,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874692311] [2021-11-13 01:33:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:28,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:28,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:28,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:33:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:33:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:29,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:29,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:29,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:30,214 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:33:30,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:33:33,644 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:33:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:33:40,542 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:33:40,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:33:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:40,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:41,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:41,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874692311] [2021-11-13 01:33:41,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874692311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:41,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:41,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:33:41,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895177708] [2021-11-13 01:33:41,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:41,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:33:41,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:33:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:33:41,104 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:43,146 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 [] [2021-11-13 01:33:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:47,117 INFO L93 Difference]: Finished difference Result 312 states and 480 transitions. [2021-11-13 01:33:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:33:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 01:33:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:47,125 INFO L225 Difference]: With dead ends: 312 [2021-11-13 01:33:47,125 INFO L226 Difference]: Without dead ends: 172 [2021-11-13 01:33:47,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:33:47,127 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 23 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5779.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 5991.10ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:47,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 756 Invalid, 266 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 1 Unknown, 136 Unchecked, 5991.10ms Time] [2021-11-13 01:33:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-13 01:33:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-13 01:33:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 171 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 261 transitions. [2021-11-13 01:33:47,144 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 261 transitions. Word has length 57 [2021-11-13 01:33:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:47,145 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 261 transitions. [2021-11-13 01:33:47,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 261 transitions. [2021-11-13 01:33:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:33:47,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:47,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:47,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:47,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:47,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -633507548, now seen corresponding path program 1 times [2021-11-13 01:33:47,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:47,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228527220] [2021-11-13 01:33:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:47,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:47,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:47,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:47,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:33:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:33:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:48,352 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:33:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:33:52,015 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:33:52,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:33:58,922 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:33:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:33:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:59,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:59,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:59,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228527220] [2021-11-13 01:33:59,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228527220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:59,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:59,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:33:59,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796501686] [2021-11-13 01:33:59,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:59,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:33:59,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:33:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:33:59,489 INFO L87 Difference]: Start difference. First operand 172 states and 261 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:00,448 INFO L93 Difference]: Finished difference Result 332 states and 504 transitions. [2021-11-13 01:34:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 01:34:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:00,451 INFO L225 Difference]: With dead ends: 332 [2021-11-13 01:34:00,451 INFO L226 Difference]: Without dead ends: 181 [2021-11-13 01:34:00,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:34:00,453 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 925.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 947.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:00,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 791 Invalid, 108 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 947.00ms Time] [2021-11-13 01:34:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-13 01:34:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-13 01:34:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.511111111111111) internal successors, (272), 180 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 272 transitions. [2021-11-13 01:34:00,469 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 272 transitions. Word has length 57 [2021-11-13 01:34:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:00,470 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 272 transitions. [2021-11-13 01:34:00,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 272 transitions. [2021-11-13 01:34:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:34:00,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:00,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:00,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:00,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:00,694 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1501432389, now seen corresponding path program 1 times [2021-11-13 01:34:00,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:00,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323666040] [2021-11-13 01:34:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:00,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:00,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:00,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:34:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:01,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:01,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:01,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:01,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:01,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:01,632 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:34:01,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:34:05,155 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:34:05,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:34:12,808 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:34:12,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:34:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:13,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:13,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323666040] [2021-11-13 01:34:13,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323666040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:13,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:13,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:34:13,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152437579] [2021-11-13 01:34:13,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:13,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:34:13,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:34:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:34:13,353 INFO L87 Difference]: Start difference. First operand 181 states and 272 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:15,387 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 [] [2021-11-13 01:34:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:19,003 INFO L93 Difference]: Finished difference Result 343 states and 521 transitions. [2021-11-13 01:34:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:34:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 01:34:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:19,007 INFO L225 Difference]: With dead ends: 343 [2021-11-13 01:34:19,007 INFO L226 Difference]: Without dead ends: 192 [2021-11-13 01:34:19,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:34:19,008 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 48 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5445.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 5624.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 649 Invalid, 167 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 1 Unknown, 46 Unchecked, 5624.88ms Time] [2021-11-13 01:34:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-13 01:34:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2021-11-13 01:34:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.518716577540107) internal successors, (284), 187 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 284 transitions. [2021-11-13 01:34:19,034 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 284 transitions. Word has length 57 [2021-11-13 01:34:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:19,035 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 284 transitions. [2021-11-13 01:34:19,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 284 transitions. [2021-11-13 01:34:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:34:19,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:19,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:19,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:19,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:19,249 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash -766087557, now seen corresponding path program 1 times [2021-11-13 01:34:19,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:19,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966517529] [2021-11-13 01:34:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:19,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:19,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:19,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:19,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:34:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:19,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:20,139 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:34:20,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:34:23,636 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:34:23,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:34:31,120 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:34:31,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:34:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:31,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:31,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:31,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966517529] [2021-11-13 01:34:31,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966517529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:31,577 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:31,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:34:31,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878018757] [2021-11-13 01:34:31,578 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:31,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:34:31,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:34:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:34:31,579 INFO L87 Difference]: Start difference. First operand 188 states and 284 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:33,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:37,445 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:40,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:41,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:41,390 INFO L93 Difference]: Finished difference Result 350 states and 532 transitions. [2021-11-13 01:34:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:34:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 01:34:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:41,394 INFO L225 Difference]: With dead ends: 350 [2021-11-13 01:34:41,394 INFO L226 Difference]: Without dead ends: 192 [2021-11-13 01:34:41,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:34:41,395 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 36 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9563.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 9789.69ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:41,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 729 Invalid, 238 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 1 Unknown, 107 Unchecked, 9789.69ms Time] [2021-11-13 01:34:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-13 01:34:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2021-11-13 01:34:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.5080213903743316) internal successors, (282), 187 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 282 transitions. [2021-11-13 01:34:41,406 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 282 transitions. Word has length 57 [2021-11-13 01:34:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:41,406 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 282 transitions. [2021-11-13 01:34:41,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 282 transitions. [2021-11-13 01:34:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:34:41,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:41,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:41,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:41,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:41,625 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:41,626 INFO L85 PathProgramCache]: Analyzing trace with hash -189606874, now seen corresponding path program 1 times [2021-11-13 01:34:41,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:41,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992992273] [2021-11-13 01:34:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:41,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:41,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:41,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:34:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:42,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:42,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:42,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992992273] [2021-11-13 01:34:42,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992992273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:42,269 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:42,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:34:42,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993813557] [2021-11-13 01:34:42,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:42,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:42,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:42,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:34:42,270 INFO L87 Difference]: Start difference. First operand 188 states and 282 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:42,334 INFO L93 Difference]: Finished difference Result 663 states and 1009 transitions. [2021-11-13 01:34:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 01:34:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:42,339 INFO L225 Difference]: With dead ends: 663 [2021-11-13 01:34:42,339 INFO L226 Difference]: Without dead ends: 505 [2021-11-13 01:34:42,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:34:42,341 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 547 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.75ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:42,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 606 Invalid, 13 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 43.75ms Time] [2021-11-13 01:34:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-13 01:34:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 348. [2021-11-13 01:34:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5100864553314122) internal successors, (524), 347 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 524 transitions. [2021-11-13 01:34:42,360 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 524 transitions. Word has length 57 [2021-11-13 01:34:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:42,361 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 524 transitions. [2021-11-13 01:34:42,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 524 transitions. [2021-11-13 01:34:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:34:42,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:42,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:42,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:42,577 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1087000152, now seen corresponding path program 1 times [2021-11-13 01:34:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:42,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512451834] [2021-11-13 01:34:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:42,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:42,580 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:42,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:34:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:43,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:43,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:43,400 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:34:43,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:34:46,818 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:34:46,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:34:53,671 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:34:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:34:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:53,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:54,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:54,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512451834] [2021-11-13 01:34:54,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512451834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:54,105 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:54,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:34:54,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915287528] [2021-11-13 01:34:54,106 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:54,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:34:54,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:34:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:34:54,107 INFO L87 Difference]: Start difference. First operand 348 states and 524 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:56,134 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 [] [2021-11-13 01:35:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:02,737 INFO L93 Difference]: Finished difference Result 682 states and 1032 transitions. [2021-11-13 01:35:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:35:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 01:35:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:02,743 INFO L225 Difference]: With dead ends: 682 [2021-11-13 01:35:02,743 INFO L226 Difference]: Without dead ends: 371 [2021-11-13 01:35:02,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-13 01:35:02,745 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 27 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4301.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 4475.77ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:02,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 600 Invalid, 238 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 1 Unknown, 116 Unchecked, 4475.77ms Time] [2021-11-13 01:35:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-13 01:35:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-11-13 01:35:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.491891891891892) internal successors, (552), 370 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 552 transitions. [2021-11-13 01:35:02,765 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 552 transitions. Word has length 57 [2021-11-13 01:35:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:02,765 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 552 transitions. [2021-11-13 01:35:02,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 552 transitions. [2021-11-13 01:35:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:35:02,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:02,767 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] [2021-11-13 01:35:02,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:02,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:02,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash 471915876, now seen corresponding path program 1 times [2021-11-13 01:35:02,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:02,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115546108] [2021-11-13 01:35:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:02,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:02,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:03,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:35:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:03,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:04,006 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:35:04,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:35:07,355 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:35:07,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:35:14,366 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:35:14,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:35:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:14,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115546108] [2021-11-13 01:35:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115546108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:14,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:14,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:35:14,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144929143] [2021-11-13 01:35:14,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:14,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:14,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:35:14,849 INFO L87 Difference]: Start difference. First operand 371 states and 552 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:16,875 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 [] [2021-11-13 01:35:20,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:22,867 INFO L93 Difference]: Finished difference Result 730 states and 1091 transitions. [2021-11-13 01:35:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:35:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-13 01:35:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:22,874 INFO L225 Difference]: With dead ends: 730 [2021-11-13 01:35:22,874 INFO L226 Difference]: Without dead ends: 396 [2021-11-13 01:35:22,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:35:22,877 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 27 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7745.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 7990.71ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:22,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 667 Invalid, 160 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [24 Valid, 99 Invalid, 2 Unknown, 35 Unchecked, 7990.71ms Time] [2021-11-13 01:35:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-13 01:35:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2021-11-13 01:35:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.4708860759493672) internal successors, (581), 395 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 581 transitions. [2021-11-13 01:35:22,903 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 581 transitions. Word has length 58 [2021-11-13 01:35:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:22,904 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 581 transitions. [2021-11-13 01:35:22,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 581 transitions. [2021-11-13 01:35:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 01:35:22,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:22,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:22,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:23,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:23,128 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash 466535849, now seen corresponding path program 1 times [2021-11-13 01:35:23,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:23,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385025017] [2021-11-13 01:35:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:23,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:23,130 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:23,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:35:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:23,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:23,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:23,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:24,117 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:35:24,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:35:27,593 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:35:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:35:34,676 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:35:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:35:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:35,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:35,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385025017] [2021-11-13 01:35:35,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385025017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:35,123 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:35,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:35:35,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542870599] [2021-11-13 01:35:35,123 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:35,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:35,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:35:35,125 INFO L87 Difference]: Start difference. First operand 396 states and 581 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:37,158 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 [] [2021-11-13 01:35:40,300 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 [] [2021-11-13 01:35:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:41,885 INFO L93 Difference]: Finished difference Result 757 states and 1120 transitions. [2021-11-13 01:35:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:35:41,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-13 01:35:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:41,891 INFO L225 Difference]: With dead ends: 757 [2021-11-13 01:35:41,892 INFO L226 Difference]: Without dead ends: 398 [2021-11-13 01:35:41,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:35:41,894 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 23 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6534.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 6738.12ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:41,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 750 Invalid, 229 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 2 Unknown, 105 Unchecked, 6738.12ms Time] [2021-11-13 01:35:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-13 01:35:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-11-13 01:35:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.4584382871536523) internal successors, (579), 397 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 579 transitions. [2021-11-13 01:35:41,918 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 579 transitions. Word has length 59 [2021-11-13 01:35:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 579 transitions. [2021-11-13 01:35:41,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 579 transitions. [2021-11-13 01:35:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 01:35:41,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:41,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:41,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:42,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:42,137 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:42,138 INFO L85 PathProgramCache]: Analyzing trace with hash 385987209, now seen corresponding path program 1 times [2021-11-13 01:35:42,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:42,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782993305] [2021-11-13 01:35:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:42,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:42,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:42,140 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:42,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:35:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:35:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:43,120 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-13 01:35:43,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-13 01:35:46,594 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-13 01:35:46,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-13 01:35:53,839 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-13 01:35:53,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-13 01:35:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:54,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:54,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:54,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782993305] [2021-11-13 01:35:54,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782993305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:54,436 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:54,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:35:54,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006864246] [2021-11-13 01:35:54,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:54,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:54,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:35:54,438 INFO L87 Difference]: Start difference. First operand 398 states and 579 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:54,987 INFO L93 Difference]: Finished difference Result 759 states and 1114 transitions. [2021-11-13 01:35:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:35:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-13 01:35:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:54,992 INFO L225 Difference]: With dead ends: 759 [2021-11-13 01:35:54,992 INFO L226 Difference]: Without dead ends: 398 [2021-11-13 01:35:54,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-13 01:35:54,994 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 10 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 522.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 536.81ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:54,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 580 Invalid, 105 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 536.81ms Time] [2021-11-13 01:35:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-13 01:35:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-11-13 01:35:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.4534005037783375) internal successors, (577), 397 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 577 transitions. [2021-11-13 01:35:55,018 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 577 transitions. Word has length 60 [2021-11-13 01:35:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 577 transitions. [2021-11-13 01:35:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 577 transitions. [2021-11-13 01:35:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 01:35:55,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:55,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:55,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:55,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:55,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:55,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1516075505, now seen corresponding path program 1 times [2021-11-13 01:35:55,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:55,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399154367] [2021-11-13 01:35:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:55,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:55,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:55,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:35:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:35:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:55,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:55,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:55,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:55,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:55,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:55,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:56,232 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:35:56,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:35:57,486 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:35:57,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:35:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:57,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:57,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:57,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399154367] [2021-11-13 01:35:57,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399154367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:57,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:57,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:35:57,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193173965] [2021-11-13 01:35:57,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:35:57,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:35:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:35:57,866 INFO L87 Difference]: Start difference. First operand 398 states and 577 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:59,906 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 [] [2021-11-13 01:36:04,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:07,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:13,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:15,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:17,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:19,195 INFO L93 Difference]: Finished difference Result 836 states and 1218 transitions. [2021-11-13 01:36:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:36:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-13 01:36:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:19,200 INFO L225 Difference]: With dead ends: 836 [2021-11-13 01:36:19,200 INFO L226 Difference]: Without dead ends: 475 [2021-11-13 01:36:19,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:19,202 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 27 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20704.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21223.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:19,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 582 Invalid, 264 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [7 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 21223.05ms Time] [2021-11-13 01:36:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-13 01:36:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 441. [2021-11-13 01:36:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.4454545454545455) internal successors, (636), 440 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 636 transitions. [2021-11-13 01:36:19,227 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 636 transitions. Word has length 60 [2021-11-13 01:36:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:19,228 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 636 transitions. [2021-11-13 01:36:19,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 636 transitions. [2021-11-13 01:36:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 01:36:19,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:19,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:19,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:19,450 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1115906109, now seen corresponding path program 1 times [2021-11-13 01:36:19,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:19,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457252404] [2021-11-13 01:36:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:19,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:19,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:19,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:19,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:36:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:20,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:20,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:20,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:20,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:20,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:20,630 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:36:20,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:36:21,384 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:36:21,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:36:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:21,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:21,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:21,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457252404] [2021-11-13 01:36:21,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457252404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:21,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:21,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:36:21,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810322082] [2021-11-13 01:36:21,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:21,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:36:21,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:36:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:21,867 INFO L87 Difference]: Start difference. First operand 441 states and 636 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:23,914 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 [] [2021-11-13 01:36:25,922 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:30,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:34,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:38,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:43,403 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:45,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:47,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:49,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:50,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:52,233 INFO L93 Difference]: Finished difference Result 1082 states and 1583 transitions. [2021-11-13 01:36:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:36:52,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-13 01:36:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:52,241 INFO L225 Difference]: With dead ends: 1082 [2021-11-13 01:36:52,241 INFO L226 Difference]: Without dead ends: 678 [2021-11-13 01:36:52,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:36:52,243 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 164 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 59 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29505.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30209.63ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:52,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 473 Invalid, 444 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [59 Valid, 382 Invalid, 3 Unknown, 0 Unchecked, 30209.63ms Time] [2021-11-13 01:36:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-13 01:36:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 470. [2021-11-13 01:36:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.4264392324093818) internal successors, (669), 469 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 669 transitions. [2021-11-13 01:36:52,273 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 669 transitions. Word has length 77 [2021-11-13 01:36:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:52,273 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 669 transitions. [2021-11-13 01:36:52,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 669 transitions. [2021-11-13 01:36:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 01:36:52,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:52,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:52,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:52,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:52,489 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 340073590, now seen corresponding path program 1 times [2021-11-13 01:36:52,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:52,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309255887] [2021-11-13 01:36:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:52,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:52,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:52,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:52,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:36:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:53,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:53,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:53,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:53,239 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:36:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:36:53,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:53,673 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:36:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:36:56,541 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:36:56,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:36:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:36:56,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:36:57,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:57,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309255887] [2021-11-13 01:36:57,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309255887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:57,084 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:57,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:36:57,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052312873] [2021-11-13 01:36:57,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:57,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:36:57,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:36:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:36:57,086 INFO L87 Difference]: Start difference. First operand 470 states and 669 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:59,118 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 [] [2021-11-13 01:37:04,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:09,656 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:11,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:16,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:22,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:27,418 INFO L93 Difference]: Finished difference Result 1338 states and 1942 transitions. [2021-11-13 01:37:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:27,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-13 01:37:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:27,424 INFO L225 Difference]: With dead ends: 1338 [2021-11-13 01:37:27,425 INFO L226 Difference]: Without dead ends: 905 [2021-11-13 01:37:27,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:37:27,427 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 298 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29318.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30146.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:27,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 505 Invalid, 501 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [83 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 30146.65ms Time] [2021-11-13 01:37:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-11-13 01:37:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 576. [2021-11-13 01:37:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.4556521739130435) internal successors, (837), 575 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 837 transitions. [2021-11-13 01:37:27,465 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 837 transitions. Word has length 82 [2021-11-13 01:37:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:27,466 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 837 transitions. [2021-11-13 01:37:27,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 837 transitions. [2021-11-13 01:37:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 01:37:27,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:27,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:27,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:27,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:27,687 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1945814063, now seen corresponding path program 1 times [2021-11-13 01:37:27,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:27,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783141249] [2021-11-13 01:37:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:27,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:27,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:27,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:37:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:37:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:28,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:28,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:28,380 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:37:28,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:37:28,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:28,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:28,825 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:37:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:37:31,485 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:37:31,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:37:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:37:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:37:32,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:32,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783141249] [2021-11-13 01:37:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783141249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:32,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:37:32,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986279419] [2021-11-13 01:37:32,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:32,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:32,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:32,028 INFO L87 Difference]: Start difference. First operand 576 states and 837 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:34,061 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 [] [2021-11-13 01:37:36,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:46,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:51,879 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:53,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:56,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:01,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:02,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:04,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:14,078 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:19,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:20,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:22,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:22,768 INFO L93 Difference]: Finished difference Result 1474 states and 2175 transitions. [2021-11-13 01:38:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:38:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-13 01:38:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:22,777 INFO L225 Difference]: With dead ends: 1474 [2021-11-13 01:38:22,777 INFO L226 Difference]: Without dead ends: 935 [2021-11-13 01:38:22,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:38:22,780 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 215 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49344.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.17ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50561.68ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:22,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 772 Invalid, 708 Unknown, 0 Unchecked, 5.17ms Time], IncrementalHoareTripleChecker [75 Valid, 631 Invalid, 2 Unknown, 0 Unchecked, 50561.68ms Time] [2021-11-13 01:38:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-13 01:38:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 620. [2021-11-13 01:38:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.4911147011308563) internal successors, (923), 619 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 923 transitions. [2021-11-13 01:38:22,828 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 923 transitions. Word has length 83 [2021-11-13 01:38:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:22,829 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 923 transitions. [2021-11-13 01:38:22,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 923 transitions. [2021-11-13 01:38:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:38:22,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:22,833 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:22,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:23,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:23,045 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -794443931, now seen corresponding path program 1 times [2021-11-13 01:38:23,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:23,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914245596] [2021-11-13 01:38:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:23,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:23,048 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:23,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:38:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:38:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:23,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:23,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:23,892 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:38:23,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:38:23,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:23,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:23,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:24,349 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:38:24,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:38:26,458 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:38:26,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:38:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:38:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:38:27,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:27,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914245596] [2021-11-13 01:38:27,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914245596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:27,312 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:27,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:38:27,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582586645] [2021-11-13 01:38:27,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:27,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:38:27,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:38:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:38:27,314 INFO L87 Difference]: Start difference. First operand 620 states and 923 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:29,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:37,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:39,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:40,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:44,078 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:48,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:50,193 INFO L93 Difference]: Finished difference Result 1615 states and 2430 transitions. [2021-11-13 01:38:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:38:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-13 01:38:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:50,201 INFO L225 Difference]: With dead ends: 1615 [2021-11-13 01:38:50,201 INFO L226 Difference]: Without dead ends: 1032 [2021-11-13 01:38:50,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:38:50,208 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 331 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22044.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22705.26ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:50,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 483 Invalid, 428 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [61 Valid, 364 Invalid, 3 Unknown, 0 Unchecked, 22705.26ms Time] [2021-11-13 01:38:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-11-13 01:38:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 723. [2021-11-13 01:38:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.5096952908587258) internal successors, (1090), 722 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1090 transitions. [2021-11-13 01:38:50,253 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1090 transitions. Word has length 111 [2021-11-13 01:38:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:50,253 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1090 transitions. [2021-11-13 01:38:50,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1090 transitions. [2021-11-13 01:38:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:38:50,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:50,257 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:50,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:50,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:50,479 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1179895462, now seen corresponding path program 1 times [2021-11-13 01:38:50,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:50,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715556080] [2021-11-13 01:38:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:50,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:50,481 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:50,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:38:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:38:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:51,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:51,315 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:38:51,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:38:51,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:51,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:51,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:51,775 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:38:51,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:38:54,264 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:38:54,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:38:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:38:54,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:38:54,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:54,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715556080] [2021-11-13 01:38:54,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715556080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:54,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:54,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:38:54,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742958897] [2021-11-13 01:38:54,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:54,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:38:54,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:38:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:38:54,976 INFO L87 Difference]: Start difference. First operand 723 states and 1090 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:57,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:03,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:09,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:14,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:17,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:21,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:25,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:27,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:28,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:29,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:31,649 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 [] [2021-11-13 01:39:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:33,015 INFO L93 Difference]: Finished difference Result 1831 states and 2768 transitions. [2021-11-13 01:39:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:39:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-13 01:39:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:33,024 INFO L225 Difference]: With dead ends: 1831 [2021-11-13 01:39:33,024 INFO L226 Difference]: Without dead ends: 1145 [2021-11-13 01:39:33,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:39:33,026 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 263 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 72 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36925.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37865.27ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:33,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 572 Invalid, 567 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [72 Valid, 491 Invalid, 4 Unknown, 0 Unchecked, 37865.27ms Time] [2021-11-13 01:39:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-11-13 01:39:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 830. [2021-11-13 01:39:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.525934861278649) internal successors, (1265), 829 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1265 transitions. [2021-11-13 01:39:33,078 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1265 transitions. Word has length 116 [2021-11-13 01:39:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:33,079 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1265 transitions. [2021-11-13 01:39:33,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1265 transitions. [2021-11-13 01:39:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:39:33,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:33,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:33,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:33,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:33,305 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash -801583245, now seen corresponding path program 1 times [2021-11-13 01:39:33,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:33,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496368237] [2021-11-13 01:39:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:33,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:33,307 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:33,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:39:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:33,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:33,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:33,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:33,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:34,079 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:39:34,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:39:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:34,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:34,640 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:39:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:39:37,087 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:39:37,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:39:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:39:37,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:39:37,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:37,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496368237] [2021-11-13 01:39:37,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496368237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:37,778 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:37,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:39:37,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189277837] [2021-11-13 01:39:37,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:37,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:39:37,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:39:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:39:37,781 INFO L87 Difference]: Start difference. First operand 830 states and 1265 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:39,809 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 [] [2021-11-13 01:39:48,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:49,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:51,800 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:55,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:57,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:59,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:05,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:06,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:10,150 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 [] [2021-11-13 01:40:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:10,244 INFO L93 Difference]: Finished difference Result 1928 states and 2925 transitions. [2021-11-13 01:40:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:40:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-13 01:40:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:10,252 INFO L225 Difference]: With dead ends: 1928 [2021-11-13 01:40:10,252 INFO L226 Difference]: Without dead ends: 1135 [2021-11-13 01:40:10,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:40:10,254 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 324 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 83 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31516.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32269.37ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:10,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 445 Invalid, 484 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [83 Valid, 398 Invalid, 3 Unknown, 0 Unchecked, 32269.37ms Time] [2021-11-13 01:40:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-11-13 01:40:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 830. [2021-11-13 01:40:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.5211097708082026) internal successors, (1261), 829 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1261 transitions. [2021-11-13 01:40:10,303 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1261 transitions. Word has length 117 [2021-11-13 01:40:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:10,304 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1261 transitions. [2021-11-13 01:40:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1261 transitions. [2021-11-13 01:40:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:40:10,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:10,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:40:10,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:10,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:40:10,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2033381055, now seen corresponding path program 1 times [2021-11-13 01:40:10,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:10,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963947795] [2021-11-13 01:40:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:10,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:10,524 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:10,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:40:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:40:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:40:11,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:40:11,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:40:11,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963947795] [2021-11-13 01:40:11,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963947795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:40:11,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:40:11,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:40:11,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597855130] [2021-11-13 01:40:11,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:40:11,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:40:11,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:11,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:40:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:40:11,547 INFO L87 Difference]: Start difference. First operand 830 states and 1261 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:12,501 INFO L93 Difference]: Finished difference Result 3091 states and 4734 transitions. [2021-11-13 01:40:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:40:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-13 01:40:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:12,514 INFO L225 Difference]: With dead ends: 3091 [2021-11-13 01:40:12,514 INFO L226 Difference]: Without dead ends: 2298 [2021-11-13 01:40:12,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:40:12,516 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 397 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 860.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 883.48ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:12,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 581 Invalid, 49 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 883.48ms Time] [2021-11-13 01:40:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-11-13 01:40:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2288. [2021-11-13 01:40:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 1.5264538696982948) internal successors, (3491), 2287 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3491 transitions. [2021-11-13 01:40:12,659 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3491 transitions. Word has length 125 [2021-11-13 01:40:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:12,660 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 3491 transitions. [2021-11-13 01:40:12,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3491 transitions. [2021-11-13 01:40:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 01:40:12,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:12,667 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:40:12,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:12,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:40:12,881 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2053704705, now seen corresponding path program 1 times [2021-11-13 01:40:12,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:12,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794274385] [2021-11-13 01:40:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:12,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:12,884 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:12,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:40:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:40:13,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:13,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:13,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:13,791 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:40:13,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:40:13,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:13,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:13,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:14,347 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:40:14,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:40:17,009 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:40:17,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:40:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:40:17,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:40:18,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:40:18,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794274385] [2021-11-13 01:40:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794274385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:40:18,515 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:40:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-13 01:40:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397949643] [2021-11-13 01:40:18,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:40:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:40:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:40:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:40:18,517 INFO L87 Difference]: Start difference. First operand 2288 states and 3491 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:20,566 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 [] [2021-11-13 01:40:30,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:35,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:41,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:41,864 INFO L93 Difference]: Finished difference Result 4976 states and 7571 transitions. [2021-11-13 01:40:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:40:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-13 01:40:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:41,883 INFO L225 Difference]: With dead ends: 4976 [2021-11-13 01:40:41,883 INFO L226 Difference]: Without dead ends: 2725 [2021-11-13 01:40:41,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:40:41,888 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 52 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22537.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23162.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:41,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 568 Invalid, 332 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 2 Unknown, 0 Unchecked, 23162.18ms Time] [2021-11-13 01:40:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-11-13 01:40:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2539. [2021-11-13 01:40:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 1.5240346729708432) internal successors, (3868), 2538 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 3868 transitions. [2021-11-13 01:40:42,043 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 3868 transitions. Word has length 126 [2021-11-13 01:40:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:42,044 INFO L470 AbstractCegarLoop]: Abstraction has 2539 states and 3868 transitions. [2021-11-13 01:40:42,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 3868 transitions. [2021-11-13 01:40:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 01:40:42,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:42,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:40:42,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:42,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:40:42,274 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash -916406397, now seen corresponding path program 1 times [2021-11-13 01:40:42,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:42,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607306387] [2021-11-13 01:40:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:42,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:42,277 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:42,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:40:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:42,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:40:42,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:42,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:42,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:42,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:43,080 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-13 01:40:43,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-13 01:40:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:43,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:43,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:43,544 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:40:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-13 01:40:44,989 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:40:44,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-13 01:40:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:40:45,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:40:45,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:40:45,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607306387] [2021-11-13 01:40:45,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607306387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:40:45,975 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:40:45,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-13 01:40:45,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049009227] [2021-11-13 01:40:45,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:40:45,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:40:45,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:40:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:40:45,977 INFO L87 Difference]: Start difference. First operand 2539 states and 3868 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:47,999 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 [] [2021-11-13 01:40:54,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:58,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:58,506 INFO L93 Difference]: Finished difference Result 5254 states and 7987 transitions. [2021-11-13 01:40:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:40:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-13 01:40:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:58,523 INFO L225 Difference]: With dead ends: 5254 [2021-11-13 01:40:58,523 INFO L226 Difference]: Without dead ends: 2752 [2021-11-13 01:40:58,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:40:58,527 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 50 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12000.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12357.76ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:58,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 551 Invalid, 169 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 12357.76ms Time] [2021-11-13 01:40:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-11-13 01:40:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2680. [2021-11-13 01:40:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2679 states have (on average 1.5166106756252333) internal successors, (4063), 2679 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 4063 transitions. [2021-11-13 01:40:58,682 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 4063 transitions. Word has length 126 [2021-11-13 01:40:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:58,682 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 4063 transitions. [2021-11-13 01:40:58,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 4063 transitions. [2021-11-13 01:40:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 01:40:58,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:58,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 01:40:58,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:58,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:40:58,905 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1708257580, now seen corresponding path program 1 times [2021-11-13 01:40:58,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:58,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682744030] [2021-11-13 01:40:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:58,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:58,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:58,908 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:58,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:40:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:40:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:59,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:59,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:59,723 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:40:59,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:40:59,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:59,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:59,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:00,234 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:41:00,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:41:02,136 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:41:02,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:41:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:41:02,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:41:02,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:02,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682744030] [2021-11-13 01:41:02,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682744030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:02,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:02,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:41:02,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412411195] [2021-11-13 01:41:02,997 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:02,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:02,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:02,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:02,998 INFO L87 Difference]: Start difference. First operand 2680 states and 4063 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:05,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:15,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:17,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:22,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:23,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:25,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:27,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:30,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:36,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:38,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:39,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:39,762 INFO L93 Difference]: Finished difference Result 6345 states and 9552 transitions. [2021-11-13 01:41:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-13 01:41:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:39,782 INFO L225 Difference]: With dead ends: 6345 [2021-11-13 01:41:39,783 INFO L226 Difference]: Without dead ends: 3702 [2021-11-13 01:41:39,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:41:39,785 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 206 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 63 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35594.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36483.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:39,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 571 Invalid, 563 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [63 Valid, 496 Invalid, 4 Unknown, 0 Unchecked, 36483.25ms Time] [2021-11-13 01:41:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-11-13 01:41:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3034. [2021-11-13 01:41:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 1.5064292779426312) internal successors, (4569), 3033 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4569 transitions. [2021-11-13 01:41:39,948 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4569 transitions. Word has length 138 [2021-11-13 01:41:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:39,948 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4569 transitions. [2021-11-13 01:41:39,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4569 transitions. [2021-11-13 01:41:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 01:41:39,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:39,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 01:41:39,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-13 01:41:40,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:40,193 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1054534706, now seen corresponding path program 1 times [2021-11-13 01:41:40,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:40,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106104381] [2021-11-13 01:41:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:40,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:40,196 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:40,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:41:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:41:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:40,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:41,022 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:41:41,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:41:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:41,674 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:41:41,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:41:43,659 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:41:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:41:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:41:43,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:41:44,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:44,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106104381] [2021-11-13 01:41:44,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106104381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:44,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:44,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:41:44,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155422857] [2021-11-13 01:41:44,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:44,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:44,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:44,442 INFO L87 Difference]: Start difference. First operand 3034 states and 4569 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:46,476 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 [] [2021-11-13 01:41:57,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:59,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:00,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:01,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:02,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:06,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:10,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:12,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:13,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:15,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:16,130 INFO L93 Difference]: Finished difference Result 6615 states and 9892 transitions. [2021-11-13 01:42:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:42:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-13 01:42:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:16,153 INFO L225 Difference]: With dead ends: 6615 [2021-11-13 01:42:16,153 INFO L226 Difference]: Without dead ends: 3618 [2021-11-13 01:42:16,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:42:16,158 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 302 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30668.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31405.29ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:16,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 472 Invalid, 480 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [77 Valid, 400 Invalid, 3 Unknown, 0 Unchecked, 31405.29ms Time] [2021-11-13 01:42:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-13 01:42:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3034. [2021-11-13 01:42:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 1.4932410154962084) internal successors, (4529), 3033 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4529 transitions. [2021-11-13 01:42:16,317 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4529 transitions. Word has length 139 [2021-11-13 01:42:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:16,317 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4529 transitions. [2021-11-13 01:42:16,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4529 transitions. [2021-11-13 01:42:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 01:42:16,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:16,325 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:16,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:16,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:16,547 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash 536372633, now seen corresponding path program 1 times [2021-11-13 01:42:16,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:16,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743623393] [2021-11-13 01:42:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:16,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:16,550 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:16,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 01:42:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:17,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:42:17,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:17,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:17,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:17,423 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:42:17,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:42:17,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:17,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:17,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:17,903 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:42:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:42:19,748 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:42:19,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:42:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:42:19,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:42:20,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:20,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743623393] [2021-11-13 01:42:20,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743623393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:20,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:20,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:42:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273487188] [2021-11-13 01:42:20,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:20,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:42:20,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:42:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:42:20,502 INFO L87 Difference]: Start difference. First operand 3034 states and 4529 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:22,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:24,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:39,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:42,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:45,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:48,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:50,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:52,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:56,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:57,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:02,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:05,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:06,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:08,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:09,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:10,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:11,114 INFO L93 Difference]: Finished difference Result 6852 states and 10163 transitions. [2021-11-13 01:43:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:43:11,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-13 01:43:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:11,125 INFO L225 Difference]: With dead ends: 6852 [2021-11-13 01:43:11,126 INFO L226 Difference]: Without dead ends: 3855 [2021-11-13 01:43:11,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:43:11,129 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 204 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 70 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49207.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50331.30ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:11,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 724 Invalid, 694 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [70 Valid, 620 Invalid, 4 Unknown, 0 Unchecked, 50331.30ms Time] [2021-11-13 01:43:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-13 01:43:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3199. [2021-11-13 01:43:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3198 states have (on average 1.4777986241400876) internal successors, (4726), 3198 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4726 transitions. [2021-11-13 01:43:11,274 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4726 transitions. Word has length 141 [2021-11-13 01:43:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:11,274 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 4726 transitions. [2021-11-13 01:43:11,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4726 transitions. [2021-11-13 01:43:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:43:11,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:11,278 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-13 01:43:11,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:11,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:11,481 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 565975067, now seen corresponding path program 1 times [2021-11-13 01:43:11,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:11,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17511310] [2021-11-13 01:43:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:11,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:11,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:11,483 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:11,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 01:43:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:43:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:12,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:12,263 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:43:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:43:12,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:12,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:12,694 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:43:12,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:43:14,337 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:43:14,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:43:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:43:14,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:43:15,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:15,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17511310] [2021-11-13 01:43:15,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17511310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:15,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:15,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:43:15,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706891831] [2021-11-13 01:43:15,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:15,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:43:15,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:43:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:43:15,057 INFO L87 Difference]: Start difference. First operand 3199 states and 4726 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:17,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:19,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:27,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:31,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:33,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:35,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:37,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:41,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:45,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:46,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:48,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:49,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:50,113 INFO L93 Difference]: Finished difference Result 6897 states and 10128 transitions. [2021-11-13 01:43:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:43:50,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-13 01:43:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:50,136 INFO L225 Difference]: With dead ends: 6897 [2021-11-13 01:43:50,137 INFO L226 Difference]: Without dead ends: 3735 [2021-11-13 01:43:50,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:43:50,144 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 243 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33865.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34766.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:50,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 582 Invalid, 597 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [74 Valid, 521 Invalid, 2 Unknown, 0 Unchecked, 34766.25ms Time] [2021-11-13 01:43:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-11-13 01:43:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3199. [2021-11-13 01:43:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3198 states have (on average 1.4615384615384615) internal successors, (4674), 3198 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4674 transitions. [2021-11-13 01:43:50,329 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4674 transitions. Word has length 142 [2021-11-13 01:43:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:50,330 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 4674 transitions. [2021-11-13 01:43:50,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4674 transitions. [2021-11-13 01:43:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:43:50,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:50,336 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:50,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:50,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:50,549 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash -801932358, now seen corresponding path program 1 times [2021-11-13 01:43:50,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:50,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257425627] [2021-11-13 01:43:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:50,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:50,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:50,552 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:50,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 01:43:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:43:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:51,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:51,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:51,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:51,403 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:43:51,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:43:51,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:51,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:51,863 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:43:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:43:53,231 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:43:53,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:43:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:43:53,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:43:53,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:53,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257425627] [2021-11-13 01:43:53,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257425627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:53,993 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:53,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:43:53,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583399274] [2021-11-13 01:43:53,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:53,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:43:53,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:43:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:43:53,994 INFO L87 Difference]: Start difference. First operand 3199 states and 4674 transitions. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:56,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:09,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:11,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:12,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:14,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:17,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:21,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:23,149 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:27,454 INFO L93 Difference]: Finished difference Result 6945 states and 10102 transitions. [2021-11-13 01:44:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:44:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-13 01:44:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:27,463 INFO L225 Difference]: With dead ends: 6945 [2021-11-13 01:44:27,464 INFO L226 Difference]: Without dead ends: 3783 [2021-11-13 01:44:27,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:44:27,467 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 249 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32291.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33171.26ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 601 Invalid, 598 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [68 Valid, 527 Invalid, 3 Unknown, 0 Unchecked, 33171.26ms Time] [2021-11-13 01:44:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-11-13 01:44:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3199. [2021-11-13 01:44:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3198 states have (on average 1.4452782989368356) internal successors, (4622), 3198 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4622 transitions. [2021-11-13 01:44:27,614 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4622 transitions. Word has length 148 [2021-11-13 01:44:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:27,614 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 4622 transitions. [2021-11-13 01:44:27,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4622 transitions. [2021-11-13 01:44:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:44:27,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:27,619 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 01:44:27,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:27,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:44:27,820 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash -886626973, now seen corresponding path program 1 times [2021-11-13 01:44:27,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:27,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069364371] [2021-11-13 01:44:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:27,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:27,824 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:27,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 01:44:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:44:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:28,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:28,724 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:44:28,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:44:28,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:29,190 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:44:29,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:44:31,488 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:44:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:44:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:44:31,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:44:32,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:32,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069364371] [2021-11-13 01:44:32,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069364371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:44:32,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:44:32,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:44:32,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66063620] [2021-11-13 01:44:32,335 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:44:32,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:44:32,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:44:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:44:32,336 INFO L87 Difference]: Start difference. First operand 3199 states and 4622 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:34,365 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:44,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:47,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:49,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:50,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:52,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:54,723 INFO L93 Difference]: Finished difference Result 7134 states and 10253 transitions. [2021-11-13 01:44:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:44:54,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-13 01:44:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:54,731 INFO L225 Difference]: With dead ends: 7134 [2021-11-13 01:44:54,732 INFO L226 Difference]: Without dead ends: 3972 [2021-11-13 01:44:54,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:44:54,735 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 245 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21522.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22135.67ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:54,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 448 Invalid, 478 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [73 Valid, 403 Invalid, 2 Unknown, 0 Unchecked, 22135.67ms Time] [2021-11-13 01:44:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-11-13 01:44:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 3406. [2021-11-13 01:44:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 1.4375917767988253) internal successors, (4895), 3405 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 4895 transitions. [2021-11-13 01:44:54,898 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 4895 transitions. Word has length 148 [2021-11-13 01:44:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:54,899 INFO L470 AbstractCegarLoop]: Abstraction has 3406 states and 4895 transitions. [2021-11-13 01:44:54,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 4895 transitions. [2021-11-13 01:44:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:44:54,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:54,917 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:54,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:55,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:44:55,134 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash -683490884, now seen corresponding path program 1 times [2021-11-13 01:44:55,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:55,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237229355] [2021-11-13 01:44:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:55,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:55,136 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:55,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 01:44:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:44:55,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:55,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:56,199 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:44:56,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:44:57,554 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:44:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:44:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 01:44:57,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 01:44:58,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:58,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237229355] [2021-11-13 01:44:58,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237229355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:44:58,142 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:44:58,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:44:58,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394319320] [2021-11-13 01:44:58,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:44:58,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:44:58,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:44:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:44:58,144 INFO L87 Difference]: Start difference. First operand 3406 states and 4895 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:45:00,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:02,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:04,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:14,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:15,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:19,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:45:20,258 INFO L93 Difference]: Finished difference Result 7006 states and 10071 transitions. [2021-11-13 01:45:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:45:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-13 01:45:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:45:20,270 INFO L225 Difference]: With dead ends: 7006 [2021-11-13 01:45:20,270 INFO L226 Difference]: Without dead ends: 3637 [2021-11-13 01:45:20,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:45:20,282 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 27 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21368.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21906.28ms IncrementalHoareTripleChecker+Time [2021-11-13 01:45:20,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 656 Invalid, 276 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 2 Unknown, 0 Unchecked, 21906.28ms Time] [2021-11-13 01:45:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3637 states. [2021-11-13 01:45:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3637 to 3559. [2021-11-13 01:45:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 1.4356379988757728) internal successors, (5108), 3558 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:45:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5108 transitions. [2021-11-13 01:45:20,501 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5108 transitions. Word has length 148 [2021-11-13 01:45:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:45:20,501 INFO L470 AbstractCegarLoop]: Abstraction has 3559 states and 5108 transitions. [2021-11-13 01:45:20,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:45:20,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5108 transitions. [2021-11-13 01:45:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-13 01:45:20,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:45:20,506 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 01:45:20,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 01:45:20,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:45:20,707 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:45:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:45:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -180614116, now seen corresponding path program 1 times [2021-11-13 01:45:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:45:20,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769303018] [2021-11-13 01:45:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:45:20,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:45:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:45:20,709 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:45:20,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19a0563-9e2c-400d-8262-c31fa94a9174/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 01:45:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:45:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:45:21,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:45:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:21,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:45:21,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:45:21,578 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:45:21,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:45:21,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:45:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:45:21,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:45:22,071 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:45:22,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:45:24,422 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:45:24,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:45:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:45:24,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:45:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:45:25,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:45:25,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769303018] [2021-11-13 01:45:25,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769303018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:45:25,254 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:45:25,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:45:25,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769128881] [2021-11-13 01:45:25,255 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:45:25,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:45:25,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:45:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:45:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:45:25,256 INFO L87 Difference]: Start difference. First operand 3559 states and 5108 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:45:27,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:37,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:39,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:44,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:45,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:45:50,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []