./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8 --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 bcfdffd5743ab46e6f5628bffe82029f1c91fa1aa61e5033c157235a6e9c82be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:17:00,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:17:00,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:17:00,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:17:00,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:17:00,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:17:00,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:17:00,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:17:00,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:17:00,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:17:00,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:17:00,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:17:00,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:17:00,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:17:00,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:17:00,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:17:00,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:17:00,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:17:00,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:17:00,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:17:00,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:17:00,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:17:00,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:17:00,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:17:00,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:17:00,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:17:00,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:17:00,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:17:00,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:17:00,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:17:00,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:17:00,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:17:00,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:17:00,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:17:00,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:17:00,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:17:00,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:17:00,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:17:00,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:17:00,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:17:00,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:17:00,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:17:00,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:17:00,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:17:00,793 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:17:00,793 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:17:00,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:17:00,794 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:17:00,794 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:17:00,794 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:17:00,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:17:00,795 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:17:00,802 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:17:00,802 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:17:00,802 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:17:00,803 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:17:00,803 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:17:00,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:17:00,804 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:17:00,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:17:00,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:17:00,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:17:00,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:17:00,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:17:00,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:17:00,806 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:17:00,806 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:17:00,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:17:00,806 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:17:00,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:17:00,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:17:00,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:17:00,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:17:00,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:17:00,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:17:00,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:17:00,810 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:17:00,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:17:00,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:17:00,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:17:00,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:17:00,812 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcfdffd5743ab46e6f5628bffe82029f1c91fa1aa61e5033c157235a6e9c82be [2021-11-07 01:17:01,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:17:01,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:17:01,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:17:01,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:17:01,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:17:01,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product14.cil.c [2021-11-07 01:17:01,234 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/965a51b98/76da60cb404548d580dade99b37e8a2d/FLAGfda396b74 [2021-11-07 01:17:01,818 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:17:01,819 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/sv-benchmarks/c/product-lines/email_spec6_product14.cil.c [2021-11-07 01:17:01,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/965a51b98/76da60cb404548d580dade99b37e8a2d/FLAGfda396b74 [2021-11-07 01:17:02,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/965a51b98/76da60cb404548d580dade99b37e8a2d [2021-11-07 01:17:02,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:17:02,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:17:02,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:17:02,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:17:02,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:17:02,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:02" (1/1) ... [2021-11-07 01:17:02,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f6c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:02, skipping insertion in model container [2021-11-07 01:17:02,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:02" (1/1) ... [2021-11-07 01:17:02,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:17:02,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:17:02,716 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/sv-benchmarks/c/product-lines/email_spec6_product14.cil.c[43937,43950] [2021-11-07 01:17:02,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:17:02,819 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) [2021-11-07 01:17:02,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e670a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:02, skipping insertion in model container [2021-11-07 01:17:02,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:17:02,820 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:17:02,823 INFO L168 Benchmark]: Toolchain (without parser) took 765.61 ms. Allocated memory was 94.4 MB in the beginning and 148.9 MB in the end (delta: 54.5 MB). Free memory was 56.9 MB in the beginning and 111.8 MB in the end (delta: -54.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:17:02,824 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 64.6 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:17:02,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 761.34 ms. Allocated memory was 94.4 MB in the beginning and 148.9 MB in the end (delta: 54.5 MB). Free memory was 56.7 MB in the beginning and 111.8 MB in the end (delta: -55.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:17:02,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 64.6 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 761.34 ms. Allocated memory was 94.4 MB in the beginning and 148.9 MB in the end (delta: 54.5 MB). Free memory was 56.7 MB in the beginning and 111.8 MB in the end (delta: -55.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2180]: 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8 --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 bcfdffd5743ab46e6f5628bffe82029f1c91fa1aa61e5033c157235a6e9c82be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:17:05,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:17:05,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:17:05,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:17:05,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:17:05,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:17:05,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:17:05,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:17:05,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:17:05,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:17:05,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:17:05,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:17:05,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:17:05,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:17:05,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:17:05,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:17:05,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:17:05,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:17:05,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:17:05,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:17:05,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:17:05,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:17:05,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:17:05,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:17:05,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:17:05,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:17:05,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:17:05,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:17:05,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:17:05,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:17:05,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:17:05,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:17:05,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:17:05,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:17:05,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:17:05,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:17:05,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:17:05,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:17:05,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:17:05,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:17:05,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:17:05,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:17:05,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:17:05,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:17:05,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:17:05,134 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:17:05,134 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:17:05,134 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:17:05,135 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:17:05,135 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:17:05,135 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:17:05,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:17:05,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:17:05,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:17:05,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:17:05,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:17:05,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:17:05,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:17:05,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:17:05,137 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:17:05,137 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:17:05,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:17:05,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:17:05,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:17:05,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:17:05,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:17:05,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:17:05,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:17:05,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:17:05,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:17:05,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:17:05,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:17:05,140 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:17:05,140 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:05,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:17:05,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:17:05,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:17:05,141 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcfdffd5743ab46e6f5628bffe82029f1c91fa1aa61e5033c157235a6e9c82be [2021-11-07 01:17:05,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:17:05,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:17:05,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:17:05,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:17:05,572 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:17:05,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product14.cil.c [2021-11-07 01:17:05,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/8a5787239/cfdc08371d4a406ebffe7407af27dc53/FLAGfb9e00852 [2021-11-07 01:17:06,336 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:17:06,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/sv-benchmarks/c/product-lines/email_spec6_product14.cil.c [2021-11-07 01:17:06,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/8a5787239/cfdc08371d4a406ebffe7407af27dc53/FLAGfb9e00852 [2021-11-07 01:17:06,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/data/8a5787239/cfdc08371d4a406ebffe7407af27dc53 [2021-11-07 01:17:06,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:17:06,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:17:06,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:17:06,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:17:06,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:17:06,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:06" (1/1) ... [2021-11-07 01:17:06,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233b1d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:06, skipping insertion in model container [2021-11-07 01:17:06,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:06" (1/1) ... [2021-11-07 01:17:06,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:17:06,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:17:07,123 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/sv-benchmarks/c/product-lines/email_spec6_product14.cil.c[43937,43950] [2021-11-07 01:17:07,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:17:07,222 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:17:07,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:17:07,305 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/sv-benchmarks/c/product-lines/email_spec6_product14.cil.c[43937,43950] [2021-11-07 01:17:07,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:17:07,363 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:17:07,459 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_a35de137-cf74-4e0a-85b7-f78cbbe91acc/sv-benchmarks/c/product-lines/email_spec6_product14.cil.c[43937,43950] [2021-11-07 01:17:07,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:17:07,560 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:17:07,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07 WrapperNode [2021-11-07 01:17:07,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:17:07,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:17:07,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:17:07,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:17:07,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:17:07,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:17:07,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:17:07,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:17:07,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:17:07,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:17:07,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:17:07,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:17:07,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (1/1) ... [2021-11-07 01:17:07,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:17:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:17:08,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:17:08,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:17:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:17:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:17:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:17:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:17:08,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:17:13,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:17:13,749 INFO L299 CfgBuilder]: Removed 489 assume(true) statements. [2021-11-07 01:17:13,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:13 BoogieIcfgContainer [2021-11-07 01:17:13,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:17:13,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:17:13,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:17:13,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:17:13,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:17:06" (1/3) ... [2021-11-07 01:17:13,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150d430e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:13, skipping insertion in model container [2021-11-07 01:17:13,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:07" (2/3) ... [2021-11-07 01:17:13,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150d430e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:13, skipping insertion in model container [2021-11-07 01:17:13,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:13" (3/3) ... [2021-11-07 01:17:13,774 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product14.cil.c [2021-11-07 01:17:13,780 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:17:13,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:17:13,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:17:13,878 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 [2021-11-07 01:17:13,878 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:17:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 808 states, 801 states have (on average 1.766541822721598) internal successors, (1415), 807 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:17:13,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:13,977 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:13,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:13,986 INFO L85 PathProgramCache]: Analyzing trace with hash -841485444, now seen corresponding path program 1 times [2021-11-07 01:17:14,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:14,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020468617] [2021-11-07 01:17:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:14,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:14,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:14,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:17:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:17:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:14,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:15,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:15,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020468617] [2021-11-07 01:17:15,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020468617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:15,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:15,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:17:15,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069579631] [2021-11-07 01:17:15,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:17:15,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:17:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:17:15,073 INFO L87 Difference]: Start difference. First operand has 808 states, 801 states have (on average 1.766541822721598) internal successors, (1415), 807 states have internal predecessors, (1415), 0 states have call successors, (0), 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 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:15,225 INFO L93 Difference]: Finished difference Result 1335 states and 2314 transitions. [2021-11-07 01:17:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:17:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-07 01:17:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:15,250 INFO L225 Difference]: With dead ends: 1335 [2021-11-07 01:17:15,250 INFO L226 Difference]: Without dead ends: 758 [2021-11-07 01:17:15,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:17:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-11-07 01:17:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2021-11-07 01:17:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 752 states have (on average 1.7553191489361701) internal successors, (1320), 757 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1320 transitions. [2021-11-07 01:17:15,364 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1320 transitions. Word has length 53 [2021-11-07 01:17:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:15,365 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1320 transitions. [2021-11-07 01:17:15,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1320 transitions. [2021-11-07 01:17:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:17:15,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:15,383 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:15,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:15,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1857241745, now seen corresponding path program 1 times [2021-11-07 01:17:15,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:15,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998780522] [2021-11-07 01:17:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:15,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:15,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:15,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:15,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:17:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:17:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:16,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:16,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:16,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998780522] [2021-11-07 01:17:16,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998780522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:16,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:16,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:17:16,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305496695] [2021-11-07 01:17:16,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:16,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:16,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:16,447 INFO L87 Difference]: Start difference. First operand 758 states and 1320 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:16,660 INFO L93 Difference]: Finished difference Result 2244 states and 3912 transitions. [2021-11-07 01:17:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:17:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 54 [2021-11-07 01:17:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:16,678 INFO L225 Difference]: With dead ends: 2244 [2021-11-07 01:17:16,678 INFO L226 Difference]: Without dead ends: 1501 [2021-11-07 01:17:16,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-11-07 01:17:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 757. [2021-11-07 01:17:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 751 states have (on average 1.7509986684420773) internal successors, (1315), 756 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1315 transitions. [2021-11-07 01:17:16,769 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1315 transitions. Word has length 54 [2021-11-07 01:17:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:16,770 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1315 transitions. [2021-11-07 01:17:16,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1315 transitions. [2021-11-07 01:17:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:17:16,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:16,785 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:16,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:17,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:17,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1778272713, now seen corresponding path program 1 times [2021-11-07 01:17:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:17,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489860645] [2021-11-07 01:17:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:17,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:17,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:17,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:17,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:17:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:17,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:17,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:17,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489860645] [2021-11-07 01:17:17,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489860645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:17,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:17,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:17:17,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591229103] [2021-11-07 01:17:17,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:17,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:17,980 INFO L87 Difference]: Start difference. First operand 757 states and 1315 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:18,334 INFO L93 Difference]: Finished difference Result 2945 states and 5122 transitions. [2021-11-07 01:17:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:17:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2021-11-07 01:17:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:18,353 INFO L225 Difference]: With dead ends: 2945 [2021-11-07 01:17:18,354 INFO L226 Difference]: Without dead ends: 2206 [2021-11-07 01:17:18,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:17:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-11-07 01:17:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 756. [2021-11-07 01:17:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.748) internal successors, (1311), 755 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1311 transitions. [2021-11-07 01:17:18,463 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1311 transitions. Word has length 56 [2021-11-07 01:17:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:18,464 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1311 transitions. [2021-11-07 01:17:18,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1311 transitions. [2021-11-07 01:17:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:17:18,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:18,469 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:18,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:18,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:18,684 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash 146987542, now seen corresponding path program 1 times [2021-11-07 01:17:18,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:18,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48898566] [2021-11-07 01:17:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:18,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:18,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:18,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:17:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:17:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:19,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:19,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:19,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48898566] [2021-11-07 01:17:19,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48898566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:19,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:19,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:17:19,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925131051] [2021-11-07 01:17:19,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:19,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:19,703 INFO L87 Difference]: Start difference. First operand 756 states and 1311 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:19,881 INFO L93 Difference]: Finished difference Result 1509 states and 2619 transitions. [2021-11-07 01:17:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:17:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:17:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:19,899 INFO L225 Difference]: With dead ends: 1509 [2021-11-07 01:17:19,900 INFO L226 Difference]: Without dead ends: 761 [2021-11-07 01:17:19,901 INFO L786 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 [2021-11-07 01:17:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-07 01:17:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 756. [2021-11-07 01:17:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.744) internal successors, (1308), 755 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1308 transitions. [2021-11-07 01:17:19,979 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1308 transitions. Word has length 57 [2021-11-07 01:17:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:19,980 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1308 transitions. [2021-11-07 01:17:19,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1308 transitions. [2021-11-07 01:17:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:17:19,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:19,983 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:20,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:20,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:20,201 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:20,202 INFO L85 PathProgramCache]: Analyzing trace with hash -874946591, now seen corresponding path program 1 times [2021-11-07 01:17:20,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:20,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277460208] [2021-11-07 01:17:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:20,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:20,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:20,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:17:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:20,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:21,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:21,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277460208] [2021-11-07 01:17:21,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277460208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:21,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:21,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:17:21,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068139513] [2021-11-07 01:17:21,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:21,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:21,057 INFO L87 Difference]: Start difference. First operand 756 states and 1308 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:21,450 INFO L93 Difference]: Finished difference Result 2932 states and 5098 transitions. [2021-11-07 01:17:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:17:21,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2021-11-07 01:17:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:21,468 INFO L225 Difference]: With dead ends: 2932 [2021-11-07 01:17:21,469 INFO L226 Difference]: Without dead ends: 2202 [2021-11-07 01:17:21,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:17:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-07 01:17:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 756. [2021-11-07 01:17:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.74) internal successors, (1305), 755 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1305 transitions. [2021-11-07 01:17:21,578 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1305 transitions. Word has length 58 [2021-11-07 01:17:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:21,579 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1305 transitions. [2021-11-07 01:17:21,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1305 transitions. [2021-11-07 01:17:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:17:21,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:21,582 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:21,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:21,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:21,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1648931782, now seen corresponding path program 1 times [2021-11-07 01:17:21,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:21,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249140048] [2021-11-07 01:17:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:21,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:21,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:17:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:22,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:22,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:22,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249140048] [2021-11-07 01:17:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249140048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:22,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:17:22,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532884177] [2021-11-07 01:17:22,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:22,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:22,805 INFO L87 Difference]: Start difference. First operand 756 states and 1305 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:22,982 INFO L93 Difference]: Finished difference Result 1963 states and 3387 transitions. [2021-11-07 01:17:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:17:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-11-07 01:17:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:22,995 INFO L225 Difference]: With dead ends: 1963 [2021-11-07 01:17:22,996 INFO L226 Difference]: Without dead ends: 1486 [2021-11-07 01:17:23,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-11-07 01:17:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1009. [2021-11-07 01:17:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1003 states have (on average 1.765702891326022) internal successors, (1771), 1008 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1771 transitions. [2021-11-07 01:17:23,115 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1771 transitions. Word has length 60 [2021-11-07 01:17:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:23,116 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1771 transitions. [2021-11-07 01:17:23,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1771 transitions. [2021-11-07 01:17:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:17:23,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:23,119 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:23,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:23,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:23,338 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1376436533, now seen corresponding path program 1 times [2021-11-07 01:17:23,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:23,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935887762] [2021-11-07 01:17:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:23,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:23,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:23,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:17:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:24,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:24,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:24,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935887762] [2021-11-07 01:17:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935887762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:24,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:24,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:24,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583742264] [2021-11-07 01:17:24,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:24,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:24,405 INFO L87 Difference]: Start difference. First operand 1009 states and 1771 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-11-07 01:17:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:24,573 INFO L93 Difference]: Finished difference Result 2612 states and 4586 transitions. [2021-11-07 01:17:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 72 [2021-11-07 01:17:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:24,588 INFO L225 Difference]: With dead ends: 2612 [2021-11-07 01:17:24,589 INFO L226 Difference]: Without dead ends: 1687 [2021-11-07 01:17:24,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-11-07 01:17:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1210. [2021-11-07 01:17:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1204 states have (on average 1.7774086378737541) internal successors, (2140), 1209 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2140 transitions. [2021-11-07 01:17:24,736 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2140 transitions. Word has length 72 [2021-11-07 01:17:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:24,739 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2140 transitions. [2021-11-07 01:17:24,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-11-07 01:17:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2140 transitions. [2021-11-07 01:17:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:17:24,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:24,743 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:24,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:24,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:24,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash 955158582, now seen corresponding path program 1 times [2021-11-07 01:17:24,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:24,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380469841] [2021-11-07 01:17:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:24,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:24,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:24,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:24,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:17:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:25,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:25,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:26,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:26,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380469841] [2021-11-07 01:17:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380469841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:26,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:26,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:26,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810224827] [2021-11-07 01:17:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:26,081 INFO L87 Difference]: Start difference. First operand 1210 states and 2140 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2021-11-07 01:17:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:26,278 INFO L93 Difference]: Finished difference Result 3259 states and 5779 transitions. [2021-11-07 01:17:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 73 [2021-11-07 01:17:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:26,294 INFO L225 Difference]: With dead ends: 3259 [2021-11-07 01:17:26,294 INFO L226 Difference]: Without dead ends: 2137 [2021-11-07 01:17:26,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-11-07 01:17:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1660. [2021-11-07 01:17:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1654 states have (on average 1.7944377267230955) internal successors, (2968), 1659 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2968 transitions. [2021-11-07 01:17:26,439 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2968 transitions. Word has length 73 [2021-11-07 01:17:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:26,439 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 2968 transitions. [2021-11-07 01:17:26,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2021-11-07 01:17:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2968 transitions. [2021-11-07 01:17:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:17:26,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:26,449 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:26,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:26,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:26,672 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1691470438, now seen corresponding path program 1 times [2021-11-07 01:17:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:26,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247391375] [2021-11-07 01:17:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:26,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:26,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:26,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:26,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:17:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:27,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:27,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:27,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247391375] [2021-11-07 01:17:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247391375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:17:27,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954683421] [2021-11-07 01:17:27,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:27,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:27,712 INFO L87 Difference]: Start difference. First operand 1660 states and 2968 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:27,875 INFO L93 Difference]: Finished difference Result 3512 states and 6242 transitions. [2021-11-07 01:17:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:27,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:17:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:27,890 INFO L225 Difference]: With dead ends: 3512 [2021-11-07 01:17:27,890 INFO L226 Difference]: Without dead ends: 2137 [2021-11-07 01:17:27,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-11-07 01:17:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1660. [2021-11-07 01:17:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1654 states have (on average 1.7932285368802903) internal successors, (2966), 1659 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2966 transitions. [2021-11-07 01:17:28,018 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2966 transitions. Word has length 74 [2021-11-07 01:17:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:28,019 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 2966 transitions. [2021-11-07 01:17:28,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2966 transitions. [2021-11-07 01:17:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:17:28,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:28,023 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:28,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:28,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:28,240 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash -873076537, now seen corresponding path program 1 times [2021-11-07 01:17:28,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:28,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194120705] [2021-11-07 01:17:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:28,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:28,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:28,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:17:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:28,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:28,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:29,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:29,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194120705] [2021-11-07 01:17:29,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194120705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:29,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:29,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:29,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970808602] [2021-11-07 01:17:29,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:29,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:29,187 INFO L87 Difference]: Start difference. First operand 1660 states and 2966 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:29,365 INFO L93 Difference]: Finished difference Result 4581 states and 8212 transitions. [2021-11-07 01:17:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-07 01:17:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:29,384 INFO L225 Difference]: With dead ends: 4581 [2021-11-07 01:17:29,384 INFO L226 Difference]: Without dead ends: 3017 [2021-11-07 01:17:29,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-11-07 01:17:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2540. [2021-11-07 01:17:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2534 states have (on average 1.8093922651933703) internal successors, (4585), 2539 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 4585 transitions. [2021-11-07 01:17:29,565 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 4585 transitions. Word has length 74 [2021-11-07 01:17:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:29,566 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 4585 transitions. [2021-11-07 01:17:29,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 4585 transitions. [2021-11-07 01:17:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:17:29,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:29,572 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:29,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:29,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:29,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash 328354740, now seen corresponding path program 1 times [2021-11-07 01:17:29,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:29,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874783990] [2021-11-07 01:17:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:29,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:29,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:29,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:17:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:30,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:30,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:30,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:30,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874783990] [2021-11-07 01:17:30,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874783990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:30,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:30,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:30,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930771702] [2021-11-07 01:17:30,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:30,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:30,750 INFO L87 Difference]: Start difference. First operand 2540 states and 4585 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:31,044 INFO L93 Difference]: Finished difference Result 6957 states and 12588 transitions. [2021-11-07 01:17:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 01:17:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:31,101 INFO L225 Difference]: With dead ends: 6957 [2021-11-07 01:17:31,101 INFO L226 Difference]: Without dead ends: 4547 [2021-11-07 01:17:31,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-11-07 01:17:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4070. [2021-11-07 01:17:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4070 states, 4064 states have (on average 1.8203740157480315) internal successors, (7398), 4069 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4070 states to 4070 states and 7398 transitions. [2021-11-07 01:17:31,442 INFO L78 Accepts]: Start accepts. Automaton has 4070 states and 7398 transitions. Word has length 75 [2021-11-07 01:17:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:31,442 INFO L470 AbstractCegarLoop]: Abstraction has 4070 states and 7398 transitions. [2021-11-07 01:17:31,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4070 states and 7398 transitions. [2021-11-07 01:17:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:17:31,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:31,450 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:31,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:31,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:31,667 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2097924950, now seen corresponding path program 1 times [2021-11-07 01:17:31,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:31,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213379019] [2021-11-07 01:17:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:31,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:31,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:31,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:17:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:32,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:32,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:32,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213379019] [2021-11-07 01:17:32,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213379019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:32,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:32,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:32,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907544449] [2021-11-07 01:17:32,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:32,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:32,673 INFO L87 Difference]: Start difference. First operand 4070 states and 7398 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:33,093 INFO L93 Difference]: Finished difference Result 11263 states and 20510 transitions. [2021-11-07 01:17:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-07 01:17:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:33,112 INFO L225 Difference]: With dead ends: 11263 [2021-11-07 01:17:33,112 INFO L226 Difference]: Without dead ends: 7357 [2021-11-07 01:17:33,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7357 states. [2021-11-07 01:17:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7357 to 6880. [2021-11-07 01:17:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6880 states, 6874 states have (on average 1.8270293860925226) internal successors, (12559), 6879 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6880 states to 6880 states and 12559 transitions. [2021-11-07 01:17:33,585 INFO L78 Accepts]: Start accepts. Automaton has 6880 states and 12559 transitions. Word has length 76 [2021-11-07 01:17:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:33,585 INFO L470 AbstractCegarLoop]: Abstraction has 6880 states and 12559 transitions. [2021-11-07 01:17:33,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 6880 states and 12559 transitions. [2021-11-07 01:17:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:17:33,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:33,595 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:33,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:33,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:33,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1168403346, now seen corresponding path program 1 times [2021-11-07 01:17:33,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:33,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409463966] [2021-11-07 01:17:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:33,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:33,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:33,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:17:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:17:34,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:17:34,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:34,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409463966] [2021-11-07 01:17:34,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409463966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:34,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:34,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:17:34,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510983677] [2021-11-07 01:17:34,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:34,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:34,851 INFO L87 Difference]: Start difference. First operand 6880 states and 12559 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:37,991 INFO L93 Difference]: Finished difference Result 26043 states and 47592 transitions. [2021-11-07 01:17:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:17:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:17:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:38,051 INFO L225 Difference]: With dead ends: 26043 [2021-11-07 01:17:38,051 INFO L226 Difference]: Without dead ends: 19446 [2021-11-07 01:17:38,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:17:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19446 states. [2021-11-07 01:17:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19446 to 6830. [2021-11-07 01:17:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6830 states, 6824 states have (on average 1.811107854630715) internal successors, (12359), 6829 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6830 states to 6830 states and 12359 transitions. [2021-11-07 01:17:38,672 INFO L78 Accepts]: Start accepts. Automaton has 6830 states and 12359 transitions. Word has length 77 [2021-11-07 01:17:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:38,673 INFO L470 AbstractCegarLoop]: Abstraction has 6830 states and 12359 transitions. [2021-11-07 01:17:38,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6830 states and 12359 transitions. [2021-11-07 01:17:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:17:38,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:38,688 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:38,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:38,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:38,902 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -725523421, now seen corresponding path program 1 times [2021-11-07 01:17:38,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:38,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078008476] [2021-11-07 01:17:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:38,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:38,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:38,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:17:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:17:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:39,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:39,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:39,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078008476] [2021-11-07 01:17:39,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078008476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:39,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:39,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:39,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126925121] [2021-11-07 01:17:39,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:39,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:39,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:39,895 INFO L87 Difference]: Start difference. First operand 6830 states and 12359 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-11-07 01:17:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:40,441 INFO L93 Difference]: Finished difference Result 20004 states and 36247 transitions. [2021-11-07 01:17:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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 77 [2021-11-07 01:17:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:40,484 INFO L225 Difference]: With dead ends: 20004 [2021-11-07 01:17:40,484 INFO L226 Difference]: Without dead ends: 13341 [2021-11-07 01:17:40,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-11-07 01:17:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12864. [2021-11-07 01:17:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12864 states, 12858 states have (on average 1.8136568673199565) internal successors, (23320), 12863 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12864 states to 12864 states and 23320 transitions. [2021-11-07 01:17:41,216 INFO L78 Accepts]: Start accepts. Automaton has 12864 states and 23320 transitions. Word has length 77 [2021-11-07 01:17:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:41,216 INFO L470 AbstractCegarLoop]: Abstraction has 12864 states and 23320 transitions. [2021-11-07 01:17:41,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-11-07 01:17:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 12864 states and 23320 transitions. [2021-11-07 01:17:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:17:41,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:41,228 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:41,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:41,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:41,444 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:17:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1572923017, now seen corresponding path program 1 times [2021-11-07 01:17:41,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:41,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348882427] [2021-11-07 01:17:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:41,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:41,446 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:41,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:17:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:42,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:42,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:42,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348882427] [2021-11-07 01:17:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348882427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:42,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696241361] [2021-11-07 01:17:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:42,616 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:42,618 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:42,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:17:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:17:43,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:44,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696241361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:44,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:17:44,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439135942] [2021-11-07 01:17:44,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:17:44,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:17:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:17:44,703 INFO L87 Difference]: Start difference. First operand 12864 states and 23320 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:07,877 INFO L93 Difference]: Finished difference Result 29267 states and 52467 transitions. [2021-11-07 01:18:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:18:07,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:18:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:08,007 INFO L225 Difference]: With dead ends: 29267 [2021-11-07 01:18:08,008 INFO L226 Difference]: Without dead ends: 28847 [2021-11-07 01:18:08,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:18:08,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28847 states. [2021-11-07 01:18:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28847 to 25436. [2021-11-07 01:18:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25436 states, 25430 states have (on average 1.8149429807314197) internal successors, (46154), 25435 states have internal predecessors, (46154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25436 states to 25436 states and 46154 transitions. [2021-11-07 01:18:09,527 INFO L78 Accepts]: Start accepts. Automaton has 25436 states and 46154 transitions. Word has length 78 [2021-11-07 01:18:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:09,528 INFO L470 AbstractCegarLoop]: Abstraction has 25436 states and 46154 transitions. [2021-11-07 01:18:09,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 25436 states and 46154 transitions. [2021-11-07 01:18:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:18:09,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:09,553 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:09,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:09,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:18:09,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:09,959 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:18:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -714996881, now seen corresponding path program 1 times [2021-11-07 01:18:09,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:09,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991912745] [2021-11-07 01:18:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:09,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:09,961 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:09,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:18:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:10,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:10,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:11,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:11,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:11,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991912745] [2021-11-07 01:18:11,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991912745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:11,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1957830999] [2021-11-07 01:18:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:11,394 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:11,395 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:11,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:18:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:12,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:12,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:12,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1957830999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:12,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:12,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:18:12,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327927995] [2021-11-07 01:18:12,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:18:12,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:18:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:18:12,817 INFO L87 Difference]: Start difference. First operand 25436 states and 46154 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-07 01:18:13,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:13,935 INFO L93 Difference]: Finished difference Result 26306 states and 47621 transitions. [2021-11-07 01:18:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:18:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 79 [2021-11-07 01:18:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:13,988 INFO L225 Difference]: With dead ends: 26306 [2021-11-07 01:18:13,989 INFO L226 Difference]: Without dead ends: 25834 [2021-11-07 01:18:13,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:18:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25834 states. [2021-11-07 01:18:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25834 to 25435. [2021-11-07 01:18:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25435 states, 25429 states have (on average 1.8148570529710173) internal successors, (46150), 25434 states have internal predecessors, (46150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25435 states to 25435 states and 46150 transitions. [2021-11-07 01:18:15,360 INFO L78 Accepts]: Start accepts. Automaton has 25435 states and 46150 transitions. Word has length 79 [2021-11-07 01:18:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:15,361 INFO L470 AbstractCegarLoop]: Abstraction has 25435 states and 46150 transitions. [2021-11-07 01:18:15,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-07 01:18:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 25435 states and 46150 transitions. [2021-11-07 01:18:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:18:15,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:15,384 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:15,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:15,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:18:15,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:15,799 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:18:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash 79499400, now seen corresponding path program 1 times [2021-11-07 01:18:15,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:15,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921330461] [2021-11-07 01:18:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:15,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:15,801 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:15,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:18:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:17,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:17,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921330461] [2021-11-07 01:18:17,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921330461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:17,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190684088] [2021-11-07 01:18:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:17,181 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:17,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:17,182 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:18:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:18:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:18,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:18,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1190684088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:18,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:18,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:18:18,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693914733] [2021-11-07 01:18:18,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:18:18,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:18:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:18:18,887 INFO L87 Difference]: Start difference. First operand 25435 states and 46150 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) [2021-11-07 01:18:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:22,160 INFO L93 Difference]: Finished difference Result 26400 states and 47767 transitions. [2021-11-07 01:18:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:18:22,161 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 79 [2021-11-07 01:18:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:22,199 INFO L225 Difference]: With dead ends: 26400 [2021-11-07 01:18:22,200 INFO L226 Difference]: Without dead ends: 25626 [2021-11-07 01:18:22,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:18:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25626 states. [2021-11-07 01:18:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25626 to 25399. [2021-11-07 01:18:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25399 states, 25393 states have (on average 1.8142401449218288) internal successors, (46069), 25398 states have internal predecessors, (46069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25399 states to 25399 states and 46069 transitions. [2021-11-07 01:18:23,444 INFO L78 Accepts]: Start accepts. Automaton has 25399 states and 46069 transitions. Word has length 79 [2021-11-07 01:18:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:23,444 INFO L470 AbstractCegarLoop]: Abstraction has 25399 states and 46069 transitions. [2021-11-07 01:18:23,445 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) [2021-11-07 01:18:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25399 states and 46069 transitions. [2021-11-07 01:18:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:18:23,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:23,460 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:23,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:23,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 01:18:23,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:23,875 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:18:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash -156997280, now seen corresponding path program 1 times [2021-11-07 01:18:23,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:23,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467279668] [2021-11-07 01:18:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:23,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:23,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:23,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:18:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:24,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:25,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:25,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467279668] [2021-11-07 01:18:25,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467279668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:25,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [956374985] [2021-11-07 01:18:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:25,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:25,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:25,137 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:25,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:18:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:18:26,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:26,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:27,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [956374985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:27,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:27,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:18:27,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631839934] [2021-11-07 01:18:27,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:18:27,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:18:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:18:27,337 INFO L87 Difference]: Start difference. First operand 25399 states and 46069 transitions. Second operand has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:45,265 INFO L93 Difference]: Finished difference Result 55965 states and 100714 transitions. [2021-11-07 01:18:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:18:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:18:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:45,350 INFO L225 Difference]: With dead ends: 55965 [2021-11-07 01:18:45,351 INFO L226 Difference]: Without dead ends: 55227 [2021-11-07 01:18:45,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:18:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55227 states. [2021-11-07 01:18:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55227 to 50433. [2021-11-07 01:18:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50433 states, 50427 states have (on average 1.8149007476153647) internal successors, (91520), 50432 states have internal predecessors, (91520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50433 states to 50433 states and 91520 transitions. [2021-11-07 01:18:47,547 INFO L78 Accepts]: Start accepts. Automaton has 50433 states and 91520 transitions. Word has length 79 [2021-11-07 01:18:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 50433 states and 91520 transitions. [2021-11-07 01:18:47,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50433 states and 91520 transitions. [2021-11-07 01:18:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:18:47,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:47,572 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:47,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:47,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:18:47,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:47,973 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:18:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 61857438, now seen corresponding path program 1 times [2021-11-07 01:18:47,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:47,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133298122] [2021-11-07 01:18:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:47,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:47,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:47,976 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:47,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:18:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:49,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:49,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:49,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133298122] [2021-11-07 01:18:49,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133298122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:49,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91804266] [2021-11-07 01:18:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:49,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:49,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:49,308 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:49,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:18:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:18:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:51,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:51,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91804266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:51,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:51,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 14 [2021-11-07 01:18:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168590245] [2021-11-07 01:18:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:18:51,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:18:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:18:51,287 INFO L87 Difference]: Start difference. First operand 50433 states and 91520 transitions. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:56,874 INFO L93 Difference]: Finished difference Result 61765 states and 110696 transitions. [2021-11-07 01:18:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:18:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:18:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:56,966 INFO L225 Difference]: With dead ends: 61765 [2021-11-07 01:18:56,966 INFO L226 Difference]: Without dead ends: 60525 [2021-11-07 01:18:56,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:18:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60525 states. [2021-11-07 01:18:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60525 to 51913. [2021-11-07 01:18:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51913 states, 51907 states have (on average 1.8101412140944382) internal successors, (93959), 51912 states have internal predecessors, (93959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51913 states to 51913 states and 93959 transitions. [2021-11-07 01:18:59,405 INFO L78 Accepts]: Start accepts. Automaton has 51913 states and 93959 transitions. Word has length 79 [2021-11-07 01:18:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:59,406 INFO L470 AbstractCegarLoop]: Abstraction has 51913 states and 93959 transitions. [2021-11-07 01:18:59,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 51913 states and 93959 transitions. [2021-11-07 01:18:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:18:59,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:59,424 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:59,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:18:59,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 01:18:59,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:59,830 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:18:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2016383453, now seen corresponding path program 1 times [2021-11-07 01:18:59,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:59,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876949724] [2021-11-07 01:18:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:59,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:59,831 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:59,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:19:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:01,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:01,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:01,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876949724] [2021-11-07 01:19:01,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876949724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:01,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1755874943] [2021-11-07 01:19:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:01,229 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:01,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:01,230 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:01,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:19:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:02,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:19:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:03,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1755874943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:03,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:03,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:19:03,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806166439] [2021-11-07 01:19:03,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:19:03,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:03,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:19:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:19:03,064 INFO L87 Difference]: Start difference. First operand 51913 states and 93959 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:05,788 INFO L93 Difference]: Finished difference Result 56045 states and 100892 transitions. [2021-11-07 01:19:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:19:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 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 80 [2021-11-07 01:19:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:05,864 INFO L225 Difference]: With dead ends: 56045 [2021-11-07 01:19:05,864 INFO L226 Difference]: Without dead ends: 53373 [2021-11-07 01:19:05,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:19:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53373 states. [2021-11-07 01:19:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53373 to 51613. [2021-11-07 01:19:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51613 states, 51607 states have (on average 1.810897746429748) internal successors, (93455), 51612 states have internal predecessors, (93455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51613 states to 51613 states and 93455 transitions. [2021-11-07 01:19:08,571 INFO L78 Accepts]: Start accepts. Automaton has 51613 states and 93455 transitions. Word has length 80 [2021-11-07 01:19:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:08,571 INFO L470 AbstractCegarLoop]: Abstraction has 51613 states and 93455 transitions. [2021-11-07 01:19:08,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 51613 states and 93455 transitions. [2021-11-07 01:19:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:19:08,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:08,590 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:08,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:08,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:08,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:08,991 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1374956491, now seen corresponding path program 1 times [2021-11-07 01:19:08,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:08,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481066117] [2021-11-07 01:19:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:08,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:08,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:08,993 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:08,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:19:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:10,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:10,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:10,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481066117] [2021-11-07 01:19:10,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481066117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:10,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408681863] [2021-11-07 01:19:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:10,433 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:10,434 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:10,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:19:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:19:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:12,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1408681863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:12,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:19:12,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36562269] [2021-11-07 01:19:12,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:12,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:19:12,189 INFO L87 Difference]: Start difference. First operand 51613 states and 93455 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:15,431 INFO L93 Difference]: Finished difference Result 57769 states and 103647 transitions. [2021-11-07 01:19:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:19:15,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-07 01:19:15,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:15,511 INFO L225 Difference]: With dead ends: 57769 [2021-11-07 01:19:15,512 INFO L226 Difference]: Without dead ends: 55213 [2021-11-07 01:19:15,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:19:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55213 states. [2021-11-07 01:19:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55213 to 51669. [2021-11-07 01:19:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51669 states, 51663 states have (on average 1.810018775526005) internal successors, (93511), 51668 states have internal predecessors, (93511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51669 states to 51669 states and 93511 transitions. [2021-11-07 01:19:18,174 INFO L78 Accepts]: Start accepts. Automaton has 51669 states and 93511 transitions. Word has length 82 [2021-11-07 01:19:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:18,175 INFO L470 AbstractCegarLoop]: Abstraction has 51669 states and 93511 transitions. [2021-11-07 01:19:18,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 51669 states and 93511 transitions. [2021-11-07 01:19:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:19:18,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:18,200 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:18,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:18,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:18,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:18,619 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1899238804, now seen corresponding path program 1 times [2021-11-07 01:19:18,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:18,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67251423] [2021-11-07 01:19:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:18,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:18,758 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:18,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:19:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:20,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:20,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:20,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67251423] [2021-11-07 01:19:20,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67251423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:20,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1198379049] [2021-11-07 01:19:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:20,502 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:20,503 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:20,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:19:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:22,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:19:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:22,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:22,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1198379049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:22,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:22,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:19:22,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878555121] [2021-11-07 01:19:22,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:22,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:19:22,500 INFO L87 Difference]: Start difference. First operand 51669 states and 93511 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:25,390 INFO L93 Difference]: Finished difference Result 56108 states and 100879 transitions. [2021-11-07 01:19:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-07 01:19:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:25,484 INFO L225 Difference]: With dead ends: 56108 [2021-11-07 01:19:25,484 INFO L226 Difference]: Without dead ends: 53353 [2021-11-07 01:19:25,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:19:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53353 states. [2021-11-07 01:19:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53353 to 51487. [2021-11-07 01:19:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51487 states, 51481 states have (on average 1.810162972747227) internal successors, (93189), 51486 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51487 states to 51487 states and 93189 transitions. [2021-11-07 01:19:28,437 INFO L78 Accepts]: Start accepts. Automaton has 51487 states and 93189 transitions. Word has length 82 [2021-11-07 01:19:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:28,438 INFO L470 AbstractCegarLoop]: Abstraction has 51487 states and 93189 transitions. [2021-11-07 01:19:28,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 51487 states and 93189 transitions. [2021-11-07 01:19:28,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:19:28,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:28,495 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:28,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:28,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-07 01:19:28,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:28,896 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1414686505, now seen corresponding path program 1 times [2021-11-07 01:19:28,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:28,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185952708] [2021-11-07 01:19:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:28,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:28,897 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:28,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:19:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:30,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:30,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:30,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185952708] [2021-11-07 01:19:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185952708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:30,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1100461672] [2021-11-07 01:19:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:30,653 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:30,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:30,660 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:30,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35de137-cf74-4e0a-85b7-f78cbbe91acc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:19:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:32,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:19:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:32,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:19:32,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1100461672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:32,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:32,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:19:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589430667] [2021-11-07 01:19:32,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:19:32,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:19:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:19:32,857 INFO L87 Difference]: Start difference. First operand 51487 states and 93189 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)