./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product34.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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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 9b6f1572bb543b70f7bd76f4bd7f000d1e6bbc46b09feb0ab48e04376b774bb9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:04,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:04,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:04,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:04,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:04,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:04,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:04,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:04,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:04,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:04,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:04,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:04,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:04,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:04,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:04,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:04,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:04,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:04,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:04,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:04,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:04,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:04,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:04,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:04,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:04,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:04,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:04,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:04,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:04,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:04,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:04,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:04,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:04,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:04,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:04,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:04,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:04,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:04,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:04,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:04,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:04,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:20:04,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:04,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:04,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:04,806 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:04,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:04,806 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:04,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:20:04,807 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:04,813 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:04,813 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:20:04,814 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:20:04,815 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:04,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:20:04,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:20:04,815 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:20:04,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:04,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:04,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:20:04,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:04,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:04,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:04,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:04,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:04,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:04,818 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:04,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:04,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:04,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:04,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:04,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:04,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:04,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:04,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:04,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:04,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:20:04,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:20:04,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:04,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:04,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:04,822 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b6f1572bb543b70f7bd76f4bd7f000d1e6bbc46b09feb0ab48e04376b774bb9 [2021-11-07 01:20:05,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:05,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:05,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:05,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:05,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:05,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product34.cil.c [2021-11-07 01:20:05,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/d31b475ed/9728225dc5424b9dba5a93787bb70e77/FLAGab18029fe [2021-11-07 01:20:05,803 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:05,803 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/sv-benchmarks/c/product-lines/email_spec8_product34.cil.c [2021-11-07 01:20:05,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/d31b475ed/9728225dc5424b9dba5a93787bb70e77/FLAGab18029fe [2021-11-07 01:20:06,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/d31b475ed/9728225dc5424b9dba5a93787bb70e77 [2021-11-07 01:20:06,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:06,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:06,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:06,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:06,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:06,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:06" (1/1) ... [2021-11-07 01:20:06,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a3b8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:06, skipping insertion in model container [2021-11-07 01:20:06,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:06" (1/1) ... [2021-11-07 01:20:06,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:06,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:06,551 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/sv-benchmarks/c/product-lines/email_spec8_product34.cil.c[28285,28298] [2021-11-07 01:20:06,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:06,801 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 01:20:06,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@244d3f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:06, skipping insertion in model container [2021-11-07 01:20:06,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:06,803 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:20:06,805 INFO L168 Benchmark]: Toolchain (without parser) took 744.08 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 54.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:06,807 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory is still 68.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:06,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.63 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 54.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:06,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory is still 68.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 741.63 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 54.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1277]: 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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 9b6f1572bb543b70f7bd76f4bd7f000d1e6bbc46b09feb0ab48e04376b774bb9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:09,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:09,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:09,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:09,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:09,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:09,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:09,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:09,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:09,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:09,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:09,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:09,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:09,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:09,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:09,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:09,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:09,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:09,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:09,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:09,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:09,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:09,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:09,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:09,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:09,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:09,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:09,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:09,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:09,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:09,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:09,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:09,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:09,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:09,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:09,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:09,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:09,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:09,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:09,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:09,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:09,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:20:09,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:09,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:09,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:09,264 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:09,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:09,265 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:09,265 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:09,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:09,266 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:09,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:09,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:09,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:09,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:09,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:09,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:09,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:09,270 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:09,270 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:20:09,270 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:20:09,270 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:09,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:09,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:09,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:09,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:09,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:20:09,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:09,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:09,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:09,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:09,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:09,273 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:20:09,273 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:09,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:09,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:09,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:09,275 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b6f1572bb543b70f7bd76f4bd7f000d1e6bbc46b09feb0ab48e04376b774bb9 [2021-11-07 01:20:09,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:09,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:09,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:09,637 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:09,638 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:09,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product34.cil.c [2021-11-07 01:20:09,719 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/7e5b96081/d3ce5fb80c9a48f7bbef24c59a020c1c/FLAG78963d93e [2021-11-07 01:20:10,423 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:10,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/sv-benchmarks/c/product-lines/email_spec8_product34.cil.c [2021-11-07 01:20:10,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/7e5b96081/d3ce5fb80c9a48f7bbef24c59a020c1c/FLAG78963d93e [2021-11-07 01:20:10,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/data/7e5b96081/d3ce5fb80c9a48f7bbef24c59a020c1c [2021-11-07 01:20:10,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:10,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:10,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:10,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:10,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:10,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:10" (1/1) ... [2021-11-07 01:20:10,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5334f95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:10, skipping insertion in model container [2021-11-07 01:20:10,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:10" (1/1) ... [2021-11-07 01:20:10,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:10,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:11,132 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/sv-benchmarks/c/product-lines/email_spec8_product34.cil.c[28285,28298] [2021-11-07 01:20:11,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:11,416 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:20:11,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:11,509 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/sv-benchmarks/c/product-lines/email_spec8_product34.cil.c[28285,28298] [2021-11-07 01:20:11,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:11,565 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:20:11,614 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_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/sv-benchmarks/c/product-lines/email_spec8_product34.cil.c[28285,28298] [2021-11-07 01:20:11,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:11,747 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:20:11,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11 WrapperNode [2021-11-07 01:20:11,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:11,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:11,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:20:11,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:20:11,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:11,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:12,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:20:12,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:20:12,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:20:12,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:20:12,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:20:12,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:20:12,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:20:12,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (1/1) ... [2021-11-07 01:20:12,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:12,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:20:12,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:20:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:20:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:20:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:20:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:20:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:20:18,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:20:18,398 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2021-11-07 01:20:18,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:18 BoogieIcfgContainer [2021-11-07 01:20:18,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:20:18,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:20:18,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:20:18,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:20:18,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:10" (1/3) ... [2021-11-07 01:20:18,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10210e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:18, skipping insertion in model container [2021-11-07 01:20:18,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:11" (2/3) ... [2021-11-07 01:20:18,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10210e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:18, skipping insertion in model container [2021-11-07 01:20:18,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:18" (3/3) ... [2021-11-07 01:20:18,411 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product34.cil.c [2021-11-07 01:20:18,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:20:18,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:20:18,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:20:18,510 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 01:20:18,510 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:20:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 1266 states, 1259 states have (on average 1.722001588562351) internal successors, (2168), 1265 states have internal predecessors, (2168), 0 states have call successors, (0), 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 01:20:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:20:18,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:18,601 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] [2021-11-07 01:20:18,601 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 01:20:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 940613266, now seen corresponding path program 1 times [2021-11-07 01:20:18,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:18,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196946521] [2021-11-07 01:20:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:18,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:18,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:18,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:20:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:19,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:20:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:19,297 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 01:20:19,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:19,419 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 01:20:19,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:19,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196946521] [2021-11-07 01:20:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196946521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:19,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:20:19,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274906069] [2021-11-07 01:20:19,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:20:19,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:19,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:20:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:20:19,446 INFO L87 Difference]: Start difference. First operand has 1266 states, 1259 states have (on average 1.722001588562351) internal successors, (2168), 1265 states have internal predecessors, (2168), 0 states have call successors, (0), 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 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 01:20:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:19,543 INFO L93 Difference]: Finished difference Result 2247 states and 3813 transitions. [2021-11-07 01:20:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:20:19,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 01:20:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:19,571 INFO L225 Difference]: With dead ends: 2247 [2021-11-07 01:20:19,571 INFO L226 Difference]: Without dead ends: 1044 [2021-11-07 01:20:19,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 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 01:20:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-07 01:20:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1044. [2021-11-07 01:20:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1038 states have (on average 1.7254335260115607) internal successors, (1791), 1043 states have internal predecessors, (1791), 0 states have call successors, (0), 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 01:20:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1791 transitions. [2021-11-07 01:20:19,731 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1791 transitions. Word has length 48 [2021-11-07 01:20:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:19,731 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1791 transitions. [2021-11-07 01:20:19,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 01:20:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1791 transitions. [2021-11-07 01:20:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:20:19,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:19,737 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] [2021-11-07 01:20:19,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:19,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:19,954 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 01:20:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1847844406, now seen corresponding path program 1 times [2021-11-07 01:20:19,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:19,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118636238] [2021-11-07 01:20:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:19,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:19,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:19,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:20:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:20,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:20,574 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 01:20:20,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:20,747 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 01:20:20,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:20,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118636238] [2021-11-07 01:20:20,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118636238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:20,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:20,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:20,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741750706] [2021-11-07 01:20:20,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:20,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:20,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:20,755 INFO L87 Difference]: Start difference. First operand 1044 states and 1791 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:20:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:20,969 INFO L93 Difference]: Finished difference Result 3102 states and 5325 transitions. [2021-11-07 01:20:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-11-07 01:20:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:20,985 INFO L225 Difference]: With dead ends: 3102 [2021-11-07 01:20:20,986 INFO L226 Difference]: Without dead ends: 2073 [2021-11-07 01:20:20,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 01:20:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-11-07 01:20:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1043. [2021-11-07 01:20:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1037 states have (on average 1.7222757955641272) internal successors, (1786), 1042 states have internal predecessors, (1786), 0 states have call successors, (0), 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 01:20:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1786 transitions. [2021-11-07 01:20:21,066 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1786 transitions. Word has length 49 [2021-11-07 01:20:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:21,068 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1786 transitions. [2021-11-07 01:20:21,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:20:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1786 transitions. [2021-11-07 01:20:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:20:21,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:21,081 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] [2021-11-07 01:20:21,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:20:21,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:21,299 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 01:20:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash -211368656, now seen corresponding path program 1 times [2021-11-07 01:20:21,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:21,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145200991] [2021-11-07 01:20:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:21,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:21,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:21,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:21,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:20:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:20:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:21,933 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 01:20:21,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:22,114 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 01:20:22,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:22,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145200991] [2021-11-07 01:20:22,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145200991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:22,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:22,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:22,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144125511] [2021-11-07 01:20:22,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:22,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:22,119 INFO L87 Difference]: Start difference. First operand 1043 states and 1786 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 01:20:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:22,488 INFO L93 Difference]: Finished difference Result 4089 states and 7006 transitions. [2021-11-07 01:20:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:20:22,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 51 [2021-11-07 01:20:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:22,508 INFO L225 Difference]: With dead ends: 4089 [2021-11-07 01:20:22,508 INFO L226 Difference]: Without dead ends: 3064 [2021-11-07 01:20:22,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 01:20:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-07 01:20:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1042. [2021-11-07 01:20:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1036 states have (on average 1.72007722007722) internal successors, (1782), 1041 states have internal predecessors, (1782), 0 states have call successors, (0), 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 01:20:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1782 transitions. [2021-11-07 01:20:22,614 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1782 transitions. Word has length 51 [2021-11-07 01:20:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:22,615 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1782 transitions. [2021-11-07 01:20:22,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 01:20:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1782 transitions. [2021-11-07 01:20:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:20:22,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:22,619 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] [2021-11-07 01:20:22,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:22,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:22,837 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 01:20:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1915586365, now seen corresponding path program 1 times [2021-11-07 01:20:22,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:22,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389603327] [2021-11-07 01:20:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:22,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:22,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:22,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:22,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:20:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:23,413 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 01:20:23,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:23,552 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 01:20:23,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:23,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389603327] [2021-11-07 01:20:23,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389603327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:23,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:23,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:23,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292168266] [2021-11-07 01:20:23,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:23,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:23,555 INFO L87 Difference]: Start difference. First operand 1042 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:20:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:23,664 INFO L93 Difference]: Finished difference Result 2081 states and 3561 transitions. [2021-11-07 01:20:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:23,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 52 [2021-11-07 01:20:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:23,672 INFO L225 Difference]: With dead ends: 2081 [2021-11-07 01:20:23,672 INFO L226 Difference]: Without dead ends: 1047 [2021-11-07 01:20:23,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:20:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-07 01:20:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1042. [2021-11-07 01:20:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1036 states have (on average 1.7171814671814671) internal successors, (1779), 1041 states have internal predecessors, (1779), 0 states have call successors, (0), 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 01:20:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1779 transitions. [2021-11-07 01:20:23,754 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1779 transitions. Word has length 52 [2021-11-07 01:20:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1779 transitions. [2021-11-07 01:20:23,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:20:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1779 transitions. [2021-11-07 01:20:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:20:23,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:23,757 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 01:20:23,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:23,972 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 01:20:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1010024424, now seen corresponding path program 1 times [2021-11-07 01:20:23,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:23,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94935499] [2021-11-07 01:20:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:23,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:23,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:23,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:23,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:20:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:24,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:20:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:24,575 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 01:20:24,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:24,720 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 01:20:24,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:24,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94935499] [2021-11-07 01:20:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94935499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:24,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647357860] [2021-11-07 01:20:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:24,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:24,723 INFO L87 Difference]: Start difference. First operand 1042 states and 1779 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:25,111 INFO L93 Difference]: Finished difference Result 4076 states and 6982 transitions. [2021-11-07 01:20:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:20:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:20:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:25,130 INFO L225 Difference]: With dead ends: 4076 [2021-11-07 01:20:25,130 INFO L226 Difference]: Without dead ends: 3060 [2021-11-07 01:20:25,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 01:20:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2021-11-07 01:20:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 1042. [2021-11-07 01:20:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1036 states have (on average 1.7142857142857142) internal successors, (1776), 1041 states have internal predecessors, (1776), 0 states have call successors, (0), 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 01:20:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1776 transitions. [2021-11-07 01:20:25,270 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1776 transitions. Word has length 53 [2021-11-07 01:20:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:25,271 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1776 transitions. [2021-11-07 01:20:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1776 transitions. [2021-11-07 01:20:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:20:25,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:25,273 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] [2021-11-07 01:20:25,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:25,488 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 01:20:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -568897261, now seen corresponding path program 1 times [2021-11-07 01:20:25,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:25,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443830377] [2021-11-07 01:20:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:25,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:25,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:25,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:25,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:20:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:26,105 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 01:20:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:26,259 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 01:20:26,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:26,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443830377] [2021-11-07 01:20:26,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443830377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:26,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:26,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:26,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62903610] [2021-11-07 01:20:26,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:26,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:26,262 INFO L87 Difference]: Start difference. First operand 1042 states and 1776 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 01:20:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:26,448 INFO L93 Difference]: Finished difference Result 2817 states and 4793 transitions. [2021-11-07 01:20:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 55 [2021-11-07 01:20:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:26,461 INFO L225 Difference]: With dead ends: 2817 [2021-11-07 01:20:26,461 INFO L226 Difference]: Without dead ends: 2058 [2021-11-07 01:20:26,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 01:20:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-07 01:20:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1299. [2021-11-07 01:20:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1293 states have (on average 1.7393658159319412) internal successors, (2249), 1298 states have internal predecessors, (2249), 0 states have call successors, (0), 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 01:20:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2249 transitions. [2021-11-07 01:20:26,577 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2249 transitions. Word has length 55 [2021-11-07 01:20:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:26,577 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2249 transitions. [2021-11-07 01:20:26,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 01:20:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2249 transitions. [2021-11-07 01:20:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:20:26,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:26,580 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] [2021-11-07 01:20:26,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:20:26,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:26,796 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 01:20:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1565617956, now seen corresponding path program 1 times [2021-11-07 01:20:26,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:26,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710817978] [2021-11-07 01:20:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:26,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:26,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:26,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:20:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:27,426 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 01:20:27,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:27,569 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 01:20:27,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:27,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710817978] [2021-11-07 01:20:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710817978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:27,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:27,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:27,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54913606] [2021-11-07 01:20:27,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:27,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:27,571 INFO L87 Difference]: Start difference. First operand 1299 states and 2249 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:27,751 INFO L93 Difference]: Finished difference Result 3478 states and 6013 transitions. [2021-11-07 01:20:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:20:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:27,765 INFO L225 Difference]: With dead ends: 3478 [2021-11-07 01:20:27,765 INFO L226 Difference]: Without dead ends: 2263 [2021-11-07 01:20:27,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:20:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-11-07 01:20:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1504. [2021-11-07 01:20:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1498 states have (on average 1.7523364485981308) internal successors, (2625), 1503 states have internal predecessors, (2625), 0 states have call successors, (0), 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 01:20:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2625 transitions. [2021-11-07 01:20:27,921 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2625 transitions. Word has length 67 [2021-11-07 01:20:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:27,921 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2625 transitions. [2021-11-07 01:20:27,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2625 transitions. [2021-11-07 01:20:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:20:27,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:27,924 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] [2021-11-07 01:20:27,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:28,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:28,139 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 01:20:28,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:28,139 INFO L85 PathProgramCache]: Analyzing trace with hash -57244797, now seen corresponding path program 1 times [2021-11-07 01:20:28,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:28,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558609268] [2021-11-07 01:20:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:28,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:28,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:28,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:28,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:20:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:28,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:28,774 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 01:20:28,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:28,939 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 01:20:28,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:28,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558609268] [2021-11-07 01:20:28,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558609268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:28,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:28,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:28,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56171055] [2021-11-07 01:20:28,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:28,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:28,942 INFO L87 Difference]: Start difference. First operand 1504 states and 2625 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:20:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:29,149 INFO L93 Difference]: Finished difference Result 4137 states and 7227 transitions. [2021-11-07 01:20:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-07 01:20:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:29,165 INFO L225 Difference]: With dead ends: 4137 [2021-11-07 01:20:29,165 INFO L226 Difference]: Without dead ends: 2721 [2021-11-07 01:20:29,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:20:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-11-07 01:20:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1962. [2021-11-07 01:20:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1956 states have (on average 1.7724948875255624) internal successors, (3467), 1961 states have internal predecessors, (3467), 0 states have call successors, (0), 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 01:20:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3467 transitions. [2021-11-07 01:20:29,334 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3467 transitions. Word has length 68 [2021-11-07 01:20:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:29,335 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 3467 transitions. [2021-11-07 01:20:29,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:20:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3467 transitions. [2021-11-07 01:20:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:20:29,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:29,338 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] [2021-11-07 01:20:29,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:29,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:29,554 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 01:20:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1667066253, now seen corresponding path program 1 times [2021-11-07 01:20:29,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:29,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959899199] [2021-11-07 01:20:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:29,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:29,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:20:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:30,241 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 01:20:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:30,411 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 01:20:30,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:30,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959899199] [2021-11-07 01:20:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959899199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:30,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:30,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:30,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745897524] [2021-11-07 01:20:30,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:30,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:30,414 INFO L87 Difference]: Start difference. First operand 1962 states and 3467 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 01:20:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:30,635 INFO L93 Difference]: Finished difference Result 4394 states and 7697 transitions. [2021-11-07 01:20:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:30,636 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 69 [2021-11-07 01:20:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:30,652 INFO L225 Difference]: With dead ends: 4394 [2021-11-07 01:20:30,653 INFO L226 Difference]: Without dead ends: 2721 [2021-11-07 01:20:30,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:20:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-11-07 01:20:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1962. [2021-11-07 01:20:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1956 states have (on average 1.771472392638037) internal successors, (3465), 1961 states have internal predecessors, (3465), 0 states have call successors, (0), 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 01:20:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3465 transitions. [2021-11-07 01:20:30,822 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3465 transitions. Word has length 69 [2021-11-07 01:20:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:30,822 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 3465 transitions. [2021-11-07 01:20:30,822 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 01:20:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3465 transitions. [2021-11-07 01:20:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:20:30,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:30,831 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] [2021-11-07 01:20:30,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:31,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:31,046 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 01:20:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2014555054, now seen corresponding path program 1 times [2021-11-07 01:20:31,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:31,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329598813] [2021-11-07 01:20:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:31,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:31,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:31,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:20:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:31,724 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 01:20:31,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:31,873 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 01:20:31,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:31,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329598813] [2021-11-07 01:20:31,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329598813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:31,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:31,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:31,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894909415] [2021-11-07 01:20:31,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:31,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:31,875 INFO L87 Difference]: Start difference. First operand 1962 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:32,120 INFO L93 Difference]: Finished difference Result 5483 states and 9702 transitions. [2021-11-07 01:20:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:20:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:32,160 INFO L225 Difference]: With dead ends: 5483 [2021-11-07 01:20:32,160 INFO L226 Difference]: Without dead ends: 3617 [2021-11-07 01:20:32,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:20:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-11-07 01:20:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 2858. [2021-11-07 01:20:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2852 states have (on average 1.7924263674614305) internal successors, (5112), 2857 states have internal predecessors, (5112), 0 states have call successors, (0), 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 01:20:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5112 transitions. [2021-11-07 01:20:32,379 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5112 transitions. Word has length 69 [2021-11-07 01:20:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:32,379 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 5112 transitions. [2021-11-07 01:20:32,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5112 transitions. [2021-11-07 01:20:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:20:32,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:32,384 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] [2021-11-07 01:20:32,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:32,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:32,599 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 01:20:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2068779333, now seen corresponding path program 1 times [2021-11-07 01:20:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:32,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640317153] [2021-11-07 01:20:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:32,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:32,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:32,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:20:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:33,323 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 01:20:33,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:33,472 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 01:20:33,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:33,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640317153] [2021-11-07 01:20:33,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640317153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:33,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:33,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:33,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783262112] [2021-11-07 01:20:33,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:33,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:33,474 INFO L87 Difference]: Start difference. First operand 2858 states and 5112 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:33,822 INFO L93 Difference]: Finished difference Result 7907 states and 14162 transitions. [2021-11-07 01:20:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:20:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:33,839 INFO L225 Difference]: With dead ends: 7907 [2021-11-07 01:20:33,839 INFO L226 Difference]: Without dead ends: 5179 [2021-11-07 01:20:33,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:20:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-11-07 01:20:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 4420. [2021-11-07 01:20:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4414 states have (on average 1.8081105573176257) internal successors, (7981), 4419 states have internal predecessors, (7981), 0 states have call successors, (0), 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 01:20:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 7981 transitions. [2021-11-07 01:20:34,141 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 7981 transitions. Word has length 70 [2021-11-07 01:20:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:34,142 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 7981 transitions. [2021-11-07 01:20:34,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 7981 transitions. [2021-11-07 01:20:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:20:34,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:34,148 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] [2021-11-07 01:20:34,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:34,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:34,363 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 01:20:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1784097693, now seen corresponding path program 1 times [2021-11-07 01:20:34,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:34,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475083534] [2021-11-07 01:20:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:34,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:34,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:34,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:34,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:20:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:34,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:35,068 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 01:20:35,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:35,204 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 01:20:35,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:35,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475083534] [2021-11-07 01:20:35,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475083534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:35,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:35,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:35,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900385275] [2021-11-07 01:20:35,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:35,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:35,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:35,206 INFO L87 Difference]: Start difference. First operand 4420 states and 7981 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:35,593 INFO L93 Difference]: Finished difference Result 12309 states and 22252 transitions. [2021-11-07 01:20:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:35,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:20:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:35,614 INFO L225 Difference]: With dead ends: 12309 [2021-11-07 01:20:35,614 INFO L226 Difference]: Without dead ends: 8053 [2021-11-07 01:20:35,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:20:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8053 states. [2021-11-07 01:20:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8053 to 7294. [2021-11-07 01:20:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7294 states, 7288 states have (on average 1.8186059275521405) internal successors, (13254), 7293 states have internal predecessors, (13254), 0 states have call successors, (0), 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 01:20:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7294 states to 7294 states and 13254 transitions. [2021-11-07 01:20:36,139 INFO L78 Accepts]: Start accepts. Automaton has 7294 states and 13254 transitions. Word has length 71 [2021-11-07 01:20:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:36,139 INFO L470 AbstractCegarLoop]: Abstraction has 7294 states and 13254 transitions. [2021-11-07 01:20:36,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7294 states and 13254 transitions. [2021-11-07 01:20:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:20:36,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:36,149 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] [2021-11-07 01:20:36,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:36,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:36,364 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 01:20:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1700981191, now seen corresponding path program 1 times [2021-11-07 01:20:36,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:36,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508293092] [2021-11-07 01:20:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:36,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:36,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:36,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:36,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:20:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:37,137 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 01:20:37,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:37,352 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 01:20:37,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:37,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508293092] [2021-11-07 01:20:37,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508293092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:37,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:37,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:37,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060059185] [2021-11-07 01:20:37,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:37,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:37,355 INFO L87 Difference]: Start difference. First operand 7294 states and 13254 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:40,747 INFO L93 Difference]: Finished difference Result 27687 states and 50351 transitions. [2021-11-07 01:20:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:20:40,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:20:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:40,800 INFO L225 Difference]: With dead ends: 27687 [2021-11-07 01:20:40,800 INFO L226 Difference]: Without dead ends: 20680 [2021-11-07 01:20:40,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:20:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-11-07 01:20:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 7244. [2021-11-07 01:20:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 7238 states have (on average 1.8035368886432717) internal successors, (13054), 7243 states have internal predecessors, (13054), 0 states have call successors, (0), 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 01:20:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 13054 transitions. [2021-11-07 01:20:41,396 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 13054 transitions. Word has length 72 [2021-11-07 01:20:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:41,397 INFO L470 AbstractCegarLoop]: Abstraction has 7244 states and 13054 transitions. [2021-11-07 01:20:41,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 13054 transitions. [2021-11-07 01:20:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:20:41,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:41,405 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 01:20:41,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:20:41,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:41,631 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 01:20:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:41,631 INFO L85 PathProgramCache]: Analyzing trace with hash 499134326, now seen corresponding path program 1 times [2021-11-07 01:20:41,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:41,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725796876] [2021-11-07 01:20:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:41,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:41,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:41,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:41,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:20:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:42,581 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 01:20:42,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:42,739 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 01:20:42,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:42,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725796876] [2021-11-07 01:20:42,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725796876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:42,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:42,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:42,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646001133] [2021-11-07 01:20:42,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:42,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:42,742 INFO L87 Difference]: Start difference. First operand 7244 states and 13054 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 01:20:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:43,284 INFO L93 Difference]: Finished difference Result 21110 states and 38094 transitions. [2021-11-07 01:20:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:43,284 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 01:20:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:43,315 INFO L225 Difference]: With dead ends: 21110 [2021-11-07 01:20:43,315 INFO L226 Difference]: Without dead ends: 14037 [2021-11-07 01:20:43,324 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 01:20:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14037 states. [2021-11-07 01:20:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14037 to 13278. [2021-11-07 01:20:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13278 states, 13272 states have (on average 1.8094484629294756) internal successors, (24015), 13277 states have internal predecessors, (24015), 0 states have call successors, (0), 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 01:20:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13278 states to 13278 states and 24015 transitions. [2021-11-07 01:20:44,072 INFO L78 Accepts]: Start accepts. Automaton has 13278 states and 24015 transitions. Word has length 72 [2021-11-07 01:20:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:44,073 INFO L470 AbstractCegarLoop]: Abstraction has 13278 states and 24015 transitions. [2021-11-07 01:20:44,073 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 01:20:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13278 states and 24015 transitions. [2021-11-07 01:20:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:20:44,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:44,083 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] [2021-11-07 01:20:44,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:20:44,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:44,298 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 01:20:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1314021570, now seen corresponding path program 1 times [2021-11-07 01:20:44,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:44,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148172743] [2021-11-07 01:20:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:44,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:44,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:44,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:44,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:20:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:45,162 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 01:20:45,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:45,352 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 01:20:45,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:45,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148172743] [2021-11-07 01:20:45,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148172743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:45,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [706676725] [2021-11-07 01:20:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:45,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:20:45,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:20:45,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:20:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:46,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:46,456 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 01:20:46,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:46,686 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 01:20:46,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [706676725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:46,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:20:46,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:20:46,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128687466] [2021-11-07 01:20:46,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:46,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:46,688 INFO L87 Difference]: Start difference. First operand 13278 states and 24015 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:47,483 INFO L93 Difference]: Finished difference Result 13939 states and 25116 transitions. [2021-11-07 01:20:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:20:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:47,509 INFO L225 Difference]: With dead ends: 13939 [2021-11-07 01:20:47,510 INFO L226 Difference]: Without dead ends: 13280 [2021-11-07 01:20:47,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13280 states. [2021-11-07 01:20:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13280 to 13266. [2021-11-07 01:20:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13266 states, 13262 states have (on average 1.8094555873925502) internal successors, (23997), 13265 states have internal predecessors, (23997), 0 states have call successors, (0), 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 01:20:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13266 states to 13266 states and 23997 transitions. [2021-11-07 01:20:48,258 INFO L78 Accepts]: Start accepts. Automaton has 13266 states and 23997 transitions. Word has length 73 [2021-11-07 01:20:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:48,259 INFO L470 AbstractCegarLoop]: Abstraction has 13266 states and 23997 transitions. [2021-11-07 01:20:48,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13266 states and 23997 transitions. [2021-11-07 01:20:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:20:48,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:48,289 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, 1, 1, 1, 1, 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 01:20:48,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:48,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:48,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:48,703 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:20:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 723699296, now seen corresponding path program 1 times [2021-11-07 01:20:48,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:48,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622921076] [2021-11-07 01:20:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:48,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:48,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:48,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:20:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:49,774 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 01:20:49,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:50,068 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 01:20:50,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:50,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622921076] [2021-11-07 01:20:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622921076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:50,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [784868923] [2021-11-07 01:20:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:50,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:50,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:20:50,069 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:20:50,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:20:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:51,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:51,480 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 01:20:51,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:51,804 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 01:20:51,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [784868923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:51,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:20:51,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:20:51,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621529320] [2021-11-07 01:20:51,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:20:51,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:20:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:20:51,807 INFO L87 Difference]: Start difference. First operand 13266 states and 23997 transitions. Second operand has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:58,857 INFO L93 Difference]: Finished difference Result 88782 states and 159793 transitions. [2021-11-07 01:20:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:20:58,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 01:20:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:58,984 INFO L225 Difference]: With dead ends: 88782 [2021-11-07 01:20:58,984 INFO L226 Difference]: Without dead ends: 88053 [2021-11-07 01:20:59,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:20:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88053 states. [2021-11-07 01:21:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88053 to 26259. [2021-11-07 01:21:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26259 states, 26255 states have (on average 1.810588459341078) internal successors, (47537), 26258 states have internal predecessors, (47537), 0 states have call successors, (0), 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 01:21:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26259 states to 26259 states and 47537 transitions. [2021-11-07 01:21:00,676 INFO L78 Accepts]: Start accepts. Automaton has 26259 states and 47537 transitions. Word has length 117 [2021-11-07 01:21:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:00,676 INFO L470 AbstractCegarLoop]: Abstraction has 26259 states and 47537 transitions. [2021-11-07 01:21:00,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 26259 states and 47537 transitions. [2021-11-07 01:21:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:21:00,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:00,729 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, 1, 1, 1, 1, 1, 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 01:21:00,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:21:00,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:01,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:01,136 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:21:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1518054317, now seen corresponding path program 1 times [2021-11-07 01:21:01,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:01,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340635643] [2021-11-07 01:21:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:01,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:01,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:01,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:21:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:02,481 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 01:21:02,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:02,774 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 01:21:02,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:02,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340635643] [2021-11-07 01:21:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340635643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:02,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:21:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54501860] [2021-11-07 01:21:02,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:02,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:02,776 INFO L87 Difference]: Start difference. First operand 26259 states and 47537 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 01:21:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:04,484 INFO L93 Difference]: Finished difference Result 51735 states and 93865 transitions. [2021-11-07 01:21:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 118 [2021-11-07 01:21:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:04,518 INFO L225 Difference]: With dead ends: 51735 [2021-11-07 01:21:04,518 INFO L226 Difference]: Without dead ends: 25766 [2021-11-07 01:21:04,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:21:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25766 states. [2021-11-07 01:21:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25766 to 13268. [2021-11-07 01:21:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13268 states, 13264 states have (on average 1.8091073582629675) internal successors, (23996), 13267 states have internal predecessors, (23996), 0 states have call successors, (0), 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 01:21:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13268 states to 13268 states and 23996 transitions. [2021-11-07 01:21:05,349 INFO L78 Accepts]: Start accepts. Automaton has 13268 states and 23996 transitions. Word has length 118 [2021-11-07 01:21:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:05,350 INFO L470 AbstractCegarLoop]: Abstraction has 13268 states and 23996 transitions. [2021-11-07 01:21:05,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 01:21:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 13268 states and 23996 transitions. [2021-11-07 01:21:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:21:05,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:05,367 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, 1, 1, 1, 1, 1, 1, 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 01:21:05,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:21:05,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:05,585 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:21:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1715298539, now seen corresponding path program 1 times [2021-11-07 01:21:05,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:05,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566461947] [2021-11-07 01:21:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:05,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:05,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:05,587 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:05,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:21:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:06,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:06,749 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 01:21:06,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:07,034 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 01:21:07,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:07,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566461947] [2021-11-07 01:21:07,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566461947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239689798] [2021-11-07 01:21:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:07,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:07,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:07,036 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:07,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:21:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:21:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:08,534 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 01:21:08,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:08,868 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 01:21:08,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239689798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:08,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:08,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:21:08,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232382985] [2021-11-07 01:21:08,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:08,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:21:08,870 INFO L87 Difference]: Start difference. First operand 13268 states and 23996 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 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 01:21:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:11,749 INFO L93 Difference]: Finished difference Result 14618 states and 26252 transitions. [2021-11-07 01:21:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 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 119 [2021-11-07 01:21:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:11,767 INFO L225 Difference]: With dead ends: 14618 [2021-11-07 01:21:11,767 INFO L226 Difference]: Without dead ends: 13878 [2021-11-07 01:21:11,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:21:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13878 states. [2021-11-07 01:21:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13878 to 13264. [2021-11-07 01:21:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 13260 states have (on average 1.8090497737556561) internal successors, (23988), 13263 states have internal predecessors, (23988), 0 states have call successors, (0), 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 01:21:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 23988 transitions. [2021-11-07 01:21:12,702 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 23988 transitions. Word has length 119 [2021-11-07 01:21:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:12,702 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 23988 transitions. [2021-11-07 01:21:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 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 01:21:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 23988 transitions. [2021-11-07 01:21:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:21:12,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:12,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:21:12,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:12,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 01:21:13,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:13,120 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:21:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash -380177699, now seen corresponding path program 1 times [2021-11-07 01:21:13,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:13,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655618780] [2021-11-07 01:21:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:13,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:13,122 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:13,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:21:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:14,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:14,440 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 01:21:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:14,753 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 01:21:14,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:14,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655618780] [2021-11-07 01:21:14,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655618780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:14,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569502197] [2021-11-07 01:21:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:14,754 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:14,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:14,754 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:14,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:21:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:21:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:17,002 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 01:21:17,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:17,508 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 01:21:17,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [569502197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:17,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:17,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:21:17,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964207410] [2021-11-07 01:21:17,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:21:17,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:21:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:21:17,510 INFO L87 Difference]: Start difference. First operand 13264 states and 23988 transitions. Second operand has 16 states, 16 states have (on average 10.8125) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 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 01:21:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:40,657 INFO L93 Difference]: Finished difference Result 35302 states and 62354 transitions. [2021-11-07 01:21:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:21:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 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 121 [2021-11-07 01:21:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:40,698 INFO L225 Difference]: With dead ends: 35302 [2021-11-07 01:21:40,699 INFO L226 Difference]: Without dead ends: 34621 [2021-11-07 01:21:40,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:21:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-11-07 01:21:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 26883. [2021-11-07 01:21:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26883 states, 26879 states have (on average 1.8072100896610737) internal successors, (48576), 26882 states have internal predecessors, (48576), 0 states have call successors, (0), 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 01:21:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26883 states to 26883 states and 48576 transitions. [2021-11-07 01:21:42,216 INFO L78 Accepts]: Start accepts. Automaton has 26883 states and 48576 transitions. Word has length 121 [2021-11-07 01:21:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 26883 states and 48576 transitions. [2021-11-07 01:21:42,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 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 01:21:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26883 states and 48576 transitions. [2021-11-07 01:21:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:21:42,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:42,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:21:42,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:42,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:42,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:42,663 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:21:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash -187767319, now seen corresponding path program 1 times [2021-11-07 01:21:42,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:42,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797773726] [2021-11-07 01:21:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:42,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:42,666 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:42,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:21:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:43,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:44,082 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 01:21:44,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:44,378 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 01:21:44,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:44,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797773726] [2021-11-07 01:21:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797773726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:44,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881653696] [2021-11-07 01:21:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:44,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:44,391 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:44,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:21:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:45,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:45,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:46,311 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 01:21:46,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:46,653 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 01:21:46,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1881653696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:46,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:46,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:21:46,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973441761] [2021-11-07 01:21:46,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:46,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:21:46,655 INFO L87 Difference]: Start difference. First operand 26883 states and 48576 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 01:21:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:49,334 INFO L93 Difference]: Finished difference Result 56159 states and 101105 transitions. [2021-11-07 01:21:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:21:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 122 [2021-11-07 01:21:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:49,426 INFO L225 Difference]: With dead ends: 56159 [2021-11-07 01:21:49,427 INFO L226 Difference]: Without dead ends: 54575 [2021-11-07 01:21:49,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:21:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54575 states. [2021-11-07 01:21:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54575 to 52871. [2021-11-07 01:21:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52871 states, 52867 states have (on average 1.8087653923997957) internal successors, (95624), 52870 states have internal predecessors, (95624), 0 states have call successors, (0), 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 01:21:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52871 states to 52871 states and 95624 transitions. [2021-11-07 01:21:52,759 INFO L78 Accepts]: Start accepts. Automaton has 52871 states and 95624 transitions. Word has length 122 [2021-11-07 01:21:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:52,759 INFO L470 AbstractCegarLoop]: Abstraction has 52871 states and 95624 transitions. [2021-11-07 01:21:52,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 01:21:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 52871 states and 95624 transitions. [2021-11-07 01:21:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:21:52,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:52,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:21:52,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:21:53,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:21:53,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:53,232 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:21:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1325691726, now seen corresponding path program 1 times [2021-11-07 01:21:53,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:53,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579736051] [2021-11-07 01:21:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:53,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:53,235 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:53,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:21:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:54,847 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 01:21:54,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:55,159 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 01:21:55,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:55,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579736051] [2021-11-07 01:21:55,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579736051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:55,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825018490] [2021-11-07 01:21:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:55,159 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:55,160 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:21:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:56,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:57,065 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 01:21:57,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:57,419 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 01:21:57,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825018490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:57,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:57,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:21:57,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543919121] [2021-11-07 01:21:57,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:57,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:21:57,420 INFO L87 Difference]: Start difference. First operand 52871 states and 95624 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 01:22:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:00,200 INFO L93 Difference]: Finished difference Result 57251 states and 102899 transitions. [2021-11-07 01:22:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 122 [2021-11-07 01:22:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:00,281 INFO L225 Difference]: With dead ends: 57251 [2021-11-07 01:22:00,281 INFO L226 Difference]: Without dead ends: 54211 [2021-11-07 01:22:00,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 476 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 01:22:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54211 states. [2021-11-07 01:22:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54211 to 52519. [2021-11-07 01:22:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52519 states, 52515 states have (on average 1.809616300104732) internal successors, (95032), 52518 states have internal predecessors, (95032), 0 states have call successors, (0), 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 01:22:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52519 states to 52519 states and 95032 transitions. [2021-11-07 01:22:03,792 INFO L78 Accepts]: Start accepts. Automaton has 52519 states and 95032 transitions. Word has length 122 [2021-11-07 01:22:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:03,793 INFO L470 AbstractCegarLoop]: Abstraction has 52519 states and 95032 transitions. [2021-11-07 01:22:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 01:22:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 52519 states and 95032 transitions. [2021-11-07 01:22:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:22:03,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:03,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:22:03,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:04,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:04,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:04,252 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:22:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:04,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1120404105, now seen corresponding path program 1 times [2021-11-07 01:22:04,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:04,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079270684] [2021-11-07 01:22:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:04,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:04,256 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:04,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:22:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:05,981 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 01:22:05,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:06,353 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 01:22:06,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079270684] [2021-11-07 01:22:06,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079270684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600055511] [2021-11-07 01:22:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:06,354 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:06,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:06,360 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:06,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f3cc58-f24e-4497-a960-fca1dc81cfc3/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:22:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:22:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:08,542 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 01:22:08,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:08,869 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 01:22:08,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600055511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:08,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:22:08,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:22:08,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552867420] [2021-11-07 01:22:08,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:22:08,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:22:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:22:08,872 INFO L87 Difference]: Start difference. First operand 52519 states and 95032 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 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 01:22:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:12,402 INFO L93 Difference]: Finished difference Result 57993 states and 104146 transitions. [2021-11-07 01:22:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:22:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 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 123 [2021-11-07 01:22:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:12,489 INFO L225 Difference]: With dead ends: 57993 [2021-11-07 01:22:12,489 INFO L226 Difference]: Without dead ends: 54899 [2021-11-07 01:22:12,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:22:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54899 states.