./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs --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 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:19:15,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:19:15,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:19:15,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:19:15,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:19:15,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:19:15,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:19:15,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:19:15,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:19:15,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:19:15,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:19:15,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:19:15,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:19:15,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:19:15,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:19:15,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:19:15,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:19:15,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:19:15,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:19:15,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:19:15,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:19:15,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:19:15,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:19:15,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:19:15,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:19:15,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:19:15,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:19:15,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:19:15,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:19:15,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:19:15,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:19:15,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:19:15,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:19:15,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:19:15,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:19:15,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:19:15,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:19:15,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:19:15,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:19:15,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:19:15,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:19:15,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:19:15,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:19:15,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:19:15,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:19:15,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:19:15,723 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:19:15,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:19:15,724 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:19:15,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:19:15,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:19:15,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:19:15,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:19:15,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:19:15,735 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:19:15,736 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:19:15,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:19:15,736 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:19:15,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:19:15,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:19:15,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:19:15,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:19:15,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:19:15,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:19:15,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:19:15,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:19:15,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:19:15,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:19:15,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:19:15,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:19:15,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:19:15,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:19:15,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:19:15,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:19:15,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:19:15,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:19:15,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:19:15,746 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:19:15,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:19:15,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:19:15,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:19:15,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:19:15,747 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_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2021-11-19 13:19:16,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:19:16,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:19:16,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:19:16,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:19:16,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:19:16,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-19 13:19:16,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/9514fc6f6/dde77782296b45e6b5fb4f6785468881/FLAG77268c2d9 [2021-11-19 13:19:16,902 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:19:16,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-19 13:19:16,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/9514fc6f6/dde77782296b45e6b5fb4f6785468881/FLAG77268c2d9 [2021-11-19 13:19:17,092 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/9514fc6f6/dde77782296b45e6b5fb4f6785468881 [2021-11-19 13:19:17,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:19:17,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:19:17,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:17,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:19:17,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:19:17,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:17" (1/1) ... [2021-11-19 13:19:17,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a54707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:17, skipping insertion in model container [2021-11-19 13:19:17,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:17" (1/1) ... [2021-11-19 13:19:17,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:19:17,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:19:17,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-19 13:19:17,906 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:17,920 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) [2021-11-19 13:19:17,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c436970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:17, skipping insertion in model container [2021-11-19 13:19:17,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:17,921 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:19:17,924 INFO L158 Benchmark]: Toolchain (without parser) took 825.03ms. Allocated memory is still 107.0MB. Free memory was 66.2MB in the beginning and 68.9MB in the end (delta: -2.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:19:17,925 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 107.0MB. Free memory was 85.4MB in the beginning and 85.3MB in the end (delta: 94.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:19:17,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 821.35ms. Allocated memory is still 107.0MB. Free memory was 66.0MB in the beginning and 68.9MB in the end (delta: -2.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:19:17,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 107.0MB. Free memory was 85.4MB in the beginning and 85.3MB in the end (delta: 94.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 821.35ms. Allocated memory is still 107.0MB. Free memory was 66.0MB in the beginning and 68.9MB in the end (delta: -2.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 582]: 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_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs --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 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:19:20,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:19:20,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:19:20,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:19:20,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:19:20,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:19:20,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:19:20,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:19:20,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:19:20,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:19:20,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:19:20,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:19:20,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:19:20,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:19:20,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:19:20,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:19:20,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:19:20,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:19:20,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:19:20,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:19:20,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:19:20,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:19:20,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:19:20,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:19:20,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:19:20,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:19:20,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:19:20,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:19:20,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:19:20,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:19:20,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:19:20,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:19:20,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:19:20,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:19:20,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:19:20,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:19:20,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:19:20,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:19:20,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:19:20,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:19:20,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:19:20,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:19:20,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:19:20,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:19:20,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:19:20,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:19:20,960 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:19:20,960 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:19:20,961 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:19:20,961 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:19:20,961 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:19:20,961 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:19:20,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:19:20,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:19:20,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:19:20,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:19:20,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:19:20,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:19:20,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:19:20,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:19:20,967 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:19:20,967 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:19:20,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:19:20,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:19:20,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:19:20,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:19:20,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:19:20,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:19:20,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:19:20,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:19:20,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:19:20,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:19:20,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:19:20,970 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:19:20,971 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:19:20,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:19:20,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:19:20,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:19:20,972 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_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2021-11-19 13:19:21,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:19:21,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:19:21,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:19:21,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:19:21,543 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:19:21,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-19 13:19:21,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/fac8a7bb8/097ac3c6ae524fb3a4597cb5457f415e/FLAG32087f21c [2021-11-19 13:19:22,453 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:19:22,454 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-19 13:19:22,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/fac8a7bb8/097ac3c6ae524fb3a4597cb5457f415e/FLAG32087f21c [2021-11-19 13:19:22,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/data/fac8a7bb8/097ac3c6ae524fb3a4597cb5457f415e [2021-11-19 13:19:22,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:19:22,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:19:22,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:22,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:19:22,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:19:22,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:22" (1/1) ... [2021-11-19 13:19:22,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498b14e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:22, skipping insertion in model container [2021-11-19 13:19:22,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:22" (1/1) ... [2021-11-19 13:19:22,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:19:22,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:19:23,204 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-19 13:19:23,561 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:23,578 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:19:23,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:19:23,627 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-19 13:19:23,832 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:23,839 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:19:23,865 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-19 13:19:23,973 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:24,011 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:19:24,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24 WrapperNode [2021-11-19 13:19:24,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:24,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:19:24,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:19:24,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:19:24,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,139 INFO L137 Inliner]: procedures = 95, calls = 340, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 800 [2021-11-19 13:19:24,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:19:24,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:19:24,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:19:24,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:19:24,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:19:24,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:19:24,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:19:24,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:19:24,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (1/1) ... [2021-11-19 13:19:24,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:19:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:19:24,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:19:24,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:19:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:19:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:19:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:19:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:19:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:19:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:19:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:19:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:19:24,357 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:19:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:19:24,357 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:19:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:19:24,357 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:19:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:19:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:19:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:19:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:19:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:19:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:19:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:19:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:19:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:19:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:19:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:19:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:19:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:19:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:19:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:19:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:19:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:19:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:19:24,361 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:19:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:19:24,361 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:19:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:19:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:19:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:19:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:19:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:19:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:19:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:19:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:19:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:19:24,363 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:19:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:19:24,363 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:19:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:19:24,364 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:19:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:19:24,366 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:19:24,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:19:24,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:19:24,368 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:19:24,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:19:24,699 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:19:24,711 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:19:26,468 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:19:26,494 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:19:26,495 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:19:26,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:19:26 BoogieIcfgContainer [2021-11-19 13:19:26,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:19:26,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:19:26,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:19:26,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:19:26,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:19:22" (1/3) ... [2021-11-19 13:19:26,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232a280b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:19:26, skipping insertion in model container [2021-11-19 13:19:26,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:24" (2/3) ... [2021-11-19 13:19:26,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232a280b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:19:26, skipping insertion in model container [2021-11-19 13:19:26,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:19:26" (3/3) ... [2021-11-19 13:19:26,513 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2021-11-19 13:19:26,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:19:26,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:19:26,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:19:26,604 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 [2021-11-19 13:19:26,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:19:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 559 states, 433 states have (on average 1.6651270207852193) internal successors, (721), 449 states have internal predecessors, (721), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 13:19:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 13:19:26,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:26,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:26,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1816535566, now seen corresponding path program 1 times [2021-11-19 13:19:26,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:26,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333279748] [2021-11-19 13:19:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:26,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:26,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:26,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:19:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:19:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:27,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:28,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:28,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333279748] [2021-11-19 13:19:28,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333279748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:28,136 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:28,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:19:28,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308904567] [2021-11-19 13:19:28,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:28,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:19:28,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:19:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:19:28,194 INFO L87 Difference]: Start difference. First operand has 559 states, 433 states have (on average 1.6651270207852193) internal successors, (721), 449 states have internal predecessors, (721), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 13:19:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:28,557 INFO L93 Difference]: Finished difference Result 1113 states and 1840 transitions. [2021-11-19 13:19:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 103 [2021-11-19 13:19:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:28,607 INFO L225 Difference]: With dead ends: 1113 [2021-11-19 13:19:28,608 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 13:19:28,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:19:28,631 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 31 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:28,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2697 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:19:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 13:19:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-19 13:19:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 429 states have (on average 1.6433566433566433) internal successors, (705), 444 states have internal predecessors, (705), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:19:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 902 transitions. [2021-11-19 13:19:28,801 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 902 transitions. Word has length 103 [2021-11-19 13:19:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:28,802 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 902 transitions. [2021-11-19 13:19:28,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 13:19:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 902 transitions. [2021-11-19 13:19:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 13:19:28,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:28,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:28,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:19:29,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:29,050 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1780397082, now seen corresponding path program 1 times [2021-11-19 13:19:29,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:29,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402994806] [2021-11-19 13:19:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:29,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:29,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:29,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:29,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:19:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:19:29,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:29,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:30,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:30,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402994806] [2021-11-19 13:19:30,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402994806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:30,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:30,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:19:30,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976371028] [2021-11-19 13:19:30,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:30,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:19:30,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:19:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:19:30,500 INFO L87 Difference]: Start difference. First operand 554 states and 902 transitions. Second operand has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:19:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:30,868 INFO L93 Difference]: Finished difference Result 1096 states and 1796 transitions. [2021-11-19 13:19:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:19:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 108 [2021-11-19 13:19:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:30,877 INFO L225 Difference]: With dead ends: 1096 [2021-11-19 13:19:30,877 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 13:19:30,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:19:30,885 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 193 mSDsluCounter, 6100 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 6986 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 6986 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:19:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 13:19:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 13:19:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.643020594965675) internal successors, (718), 453 states have internal predecessors, (718), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 96 states have call predecessors, (99), 98 states have call successors, (99) [2021-11-19 13:19:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 916 transitions. [2021-11-19 13:19:30,937 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 916 transitions. Word has length 108 [2021-11-19 13:19:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:30,938 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 916 transitions. [2021-11-19 13:19:30,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:19:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 916 transitions. [2021-11-19 13:19:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 13:19:30,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:30,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:30,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:31,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:31,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1119714406, now seen corresponding path program 1 times [2021-11-19 13:19:31,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:31,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375435420] [2021-11-19 13:19:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:31,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:31,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:31,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:19:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:19:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:31,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:32,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:32,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375435420] [2021-11-19 13:19:32,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375435420] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:32,194 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:32,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:19:32,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692515115] [2021-11-19 13:19:32,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:19:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:19:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:19:32,197 INFO L87 Difference]: Start difference. First operand 563 states and 916 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:19:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:32,543 INFO L93 Difference]: Finished difference Result 1152 states and 1887 transitions. [2021-11-19 13:19:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:32,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 109 [2021-11-19 13:19:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:32,552 INFO L225 Difference]: With dead ends: 1152 [2021-11-19 13:19:32,552 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 13:19:32,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:19:32,559 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 136 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:32,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2515 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:19:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 13:19:32,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 568. [2021-11-19 13:19:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 442 states have (on average 1.585972850678733) internal successors, (701), 457 states have internal predecessors, (701), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:19:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 898 transitions. [2021-11-19 13:19:32,600 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 898 transitions. Word has length 109 [2021-11-19 13:19:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:32,601 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 898 transitions. [2021-11-19 13:19:32,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:19:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 898 transitions. [2021-11-19 13:19:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:19:32,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:32,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:32,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:32,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:32,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1813012661, now seen corresponding path program 1 times [2021-11-19 13:19:32,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:32,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245958741] [2021-11-19 13:19:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:32,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:32,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:32,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:19:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:19:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:33,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:33,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:33,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245958741] [2021-11-19 13:19:33,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245958741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:33,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:33,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:19:33,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786909198] [2021-11-19 13:19:33,997 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:33,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:19:33,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:19:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:19:33,999 INFO L87 Difference]: Start difference. First operand 568 states and 898 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:19:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:34,242 INFO L93 Difference]: Finished difference Result 1094 states and 1750 transitions. [2021-11-19 13:19:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:19:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 111 [2021-11-19 13:19:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:34,250 INFO L225 Difference]: With dead ends: 1094 [2021-11-19 13:19:34,250 INFO L226 Difference]: Without dead ends: 556 [2021-11-19 13:19:34,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:19:34,256 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 86 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:34,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5914 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:19:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-19 13:19:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 547. [2021-11-19 13:19:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 421 states have (on average 1.5985748218527316) internal successors, (673), 436 states have internal predecessors, (673), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:19:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 870 transitions. [2021-11-19 13:19:34,293 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 870 transitions. Word has length 111 [2021-11-19 13:19:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:34,294 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 870 transitions. [2021-11-19 13:19:34,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:19:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 870 transitions. [2021-11-19 13:19:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:19:34,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:34,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:34,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:34,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:34,513 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash -645425913, now seen corresponding path program 1 times [2021-11-19 13:19:34,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:34,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510978435] [2021-11-19 13:19:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:34,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:34,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:34,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:19:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:19:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:35,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:19:35,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:35,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510978435] [2021-11-19 13:19:35,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510978435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:35,852 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:35,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:19:35,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309917838] [2021-11-19 13:19:35,852 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:35,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:19:35,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:19:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:19:35,854 INFO L87 Difference]: Start difference. First operand 547 states and 870 transitions. Second operand has 13 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:19:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:36,317 INFO L93 Difference]: Finished difference Result 1063 states and 1705 transitions. [2021-11-19 13:19:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:19:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 114 [2021-11-19 13:19:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:36,325 INFO L225 Difference]: With dead ends: 1063 [2021-11-19 13:19:36,326 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 13:19:36,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:19:36,332 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 45 mSDsluCounter, 8211 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 9038 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:36,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 9038 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:19:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 13:19:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 549. [2021-11-19 13:19:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 423 states have (on average 1.5933806146572105) internal successors, (674), 438 states have internal predecessors, (674), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:19:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 871 transitions. [2021-11-19 13:19:36,372 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 871 transitions. Word has length 114 [2021-11-19 13:19:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:36,373 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 871 transitions. [2021-11-19 13:19:36,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:19:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 871 transitions. [2021-11-19 13:19:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 13:19:36,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:36,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:36,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:36,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:36,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash -906894235, now seen corresponding path program 1 times [2021-11-19 13:19:36,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:36,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768094694] [2021-11-19 13:19:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:36,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:36,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:36,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:19:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:19:36,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:19:37,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:19:37,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:37,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768094694] [2021-11-19 13:19:37,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768094694] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:19:37,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:19:37,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:19:37,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423643978] [2021-11-19 13:19:37,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:37,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:19:37,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:19:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:19:37,774 INFO L87 Difference]: Start difference. First operand 549 states and 871 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:38,928 INFO L93 Difference]: Finished difference Result 1059 states and 1726 transitions. [2021-11-19 13:19:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:38,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-19 13:19:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:38,935 INFO L225 Difference]: With dead ends: 1059 [2021-11-19 13:19:38,935 INFO L226 Difference]: Without dead ends: 553 [2021-11-19 13:19:38,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:19:38,949 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 803 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:38,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2092 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 13:19:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-19 13:19:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-19 13:19:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 426 states have (on average 1.5892018779342723) internal successors, (677), 441 states have internal predecessors, (677), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (99), 96 states have call predecessors, (99), 98 states have call successors, (99) [2021-11-19 13:19:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 875 transitions. [2021-11-19 13:19:39,001 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 875 transitions. Word has length 115 [2021-11-19 13:19:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:39,003 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 875 transitions. [2021-11-19 13:19:39,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 875 transitions. [2021-11-19 13:19:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:19:39,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:39,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:39,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:39,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:39,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash 766219231, now seen corresponding path program 1 times [2021-11-19 13:19:39,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:39,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830989587] [2021-11-19 13:19:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:39,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:39,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:39,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:39,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:19:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:19:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:19:39,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:19:40,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:40,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830989587] [2021-11-19 13:19:40,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830989587] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:19:40,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:19:40,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:19:40,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466303388] [2021-11-19 13:19:40,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:19:40,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:19:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:19:40,284 INFO L87 Difference]: Start difference. First operand 553 states and 875 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:41,276 INFO L93 Difference]: Finished difference Result 1068 states and 1733 transitions. [2021-11-19 13:19:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-19 13:19:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:41,283 INFO L225 Difference]: With dead ends: 1068 [2021-11-19 13:19:41,283 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 13:19:41,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:19:41,294 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 798 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:41,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 2093 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:19:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 13:19:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 13:19:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 430 states have (on average 1.583720930232558) internal successors, (681), 445 states have internal predecessors, (681), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (100), 96 states have call predecessors, (100), 98 states have call successors, (100) [2021-11-19 13:19:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 880 transitions. [2021-11-19 13:19:41,330 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 880 transitions. Word has length 118 [2021-11-19 13:19:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:41,333 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 880 transitions. [2021-11-19 13:19:41,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 880 transitions. [2021-11-19 13:19:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 13:19:41,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:41,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:41,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:41,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:41,556 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -35541343, now seen corresponding path program 1 times [2021-11-19 13:19:41,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:41,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874475055] [2021-11-19 13:19:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:41,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:41,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:41,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:19:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:19:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:19:42,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:19:42,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:42,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874475055] [2021-11-19 13:19:42,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874475055] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:19:42,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:19:42,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:19:42,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784369953] [2021-11-19 13:19:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:42,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:19:42,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:19:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:19:42,621 INFO L87 Difference]: Start difference. First operand 558 states and 880 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:43,676 INFO L93 Difference]: Finished difference Result 1079 states and 1742 transitions. [2021-11-19 13:19:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-19 13:19:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:43,684 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 13:19:43,684 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 13:19:43,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:19:43,693 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 789 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:43,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2093 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:19:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 13:19:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-19 13:19:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 435 states have (on average 1.5770114942528735) internal successors, (686), 450 states have internal predecessors, (686), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (101), 96 states have call predecessors, (101), 98 states have call successors, (101) [2021-11-19 13:19:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 886 transitions. [2021-11-19 13:19:43,735 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 886 transitions. Word has length 121 [2021-11-19 13:19:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:43,736 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 886 transitions. [2021-11-19 13:19:43,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 886 transitions. [2021-11-19 13:19:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 13:19:43,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:43,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:43,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:43,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:43,959 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1250286445, now seen corresponding path program 1 times [2021-11-19 13:19:43,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:43,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649325282] [2021-11-19 13:19:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:43,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:43,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:43,963 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:43,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:19:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:19:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:19:44,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:19:45,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:45,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649325282] [2021-11-19 13:19:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649325282] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:19:45,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:19:45,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:19:45,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198791911] [2021-11-19 13:19:45,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:45,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:19:45,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:19:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:19:45,067 INFO L87 Difference]: Start difference. First operand 564 states and 886 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:46,141 INFO L93 Difference]: Finished difference Result 1092 states and 1753 transitions. [2021-11-19 13:19:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-11-19 13:19:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:46,147 INFO L225 Difference]: With dead ends: 1092 [2021-11-19 13:19:46,148 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 13:19:46,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:19:46,155 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 790 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:46,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2093 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:19:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 13:19:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-19 13:19:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 441 states have (on average 1.5691609977324263) internal successors, (692), 456 states have internal predecessors, (692), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2021-11-19 13:19:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 893 transitions. [2021-11-19 13:19:46,192 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 893 transitions. Word has length 124 [2021-11-19 13:19:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:46,192 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 893 transitions. [2021-11-19 13:19:46,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:19:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 893 transitions. [2021-11-19 13:19:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:19:46,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:46,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:46,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:46,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:46,423 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1296975139, now seen corresponding path program 1 times [2021-11-19 13:19:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:46,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412587367] [2021-11-19 13:19:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:46,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:46,426 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:46,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:19:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:19:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:19:47,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 13:19:47,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:47,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412587367] [2021-11-19 13:19:47,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412587367] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:19:47,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:19:47,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-19 13:19:47,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547958912] [2021-11-19 13:19:47,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:47,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:19:47,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:19:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:19:47,882 INFO L87 Difference]: Start difference. First operand 571 states and 893 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:19:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:55,795 INFO L93 Difference]: Finished difference Result 1923 states and 3090 transitions. [2021-11-19 13:19:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:19:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2021-11-19 13:19:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:55,811 INFO L225 Difference]: With dead ends: 1923 [2021-11-19 13:19:55,811 INFO L226 Difference]: Without dead ends: 1395 [2021-11-19 13:19:55,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:19:55,818 INFO L933 BasicCegarLoop]: 1437 mSDtfsCounter, 1682 mSDsluCounter, 2698 mSDsCounter, 0 mSdLazyCounter, 5003 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 4135 SdHoareTripleChecker+Invalid, 5682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 5003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:55,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1792 Valid, 4135 Invalid, 5682 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [679 Valid, 5003 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-11-19 13:19:55,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-11-19 13:19:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1173. [2021-11-19 13:19:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 884 states have (on average 1.5735294117647058) internal successors, (1391), 921 states have internal predecessors, (1391), 224 states have call successors, (224), 59 states have call predecessors, (224), 64 states have return successors, (249), 223 states have call predecessors, (249), 222 states have call successors, (249) [2021-11-19 13:19:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1864 transitions. [2021-11-19 13:19:55,925 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1864 transitions. Word has length 127 [2021-11-19 13:19:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:55,925 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1864 transitions. [2021-11-19 13:19:55,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:19:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1864 transitions. [2021-11-19 13:19:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:19:55,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:55,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:55,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:56,153 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 395691657, now seen corresponding path program 1 times [2021-11-19 13:19:56,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:56,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373301624] [2021-11-19 13:19:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:56,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:56,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:56,156 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:56,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:19:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:19:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:19:56,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:19:57,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:57,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373301624] [2021-11-19 13:19:57,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373301624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:57,371 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:57,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 13:19:57,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859357908] [2021-11-19 13:19:57,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:57,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:19:57,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:19:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:19:57,373 INFO L87 Difference]: Start difference. First operand 1173 states and 1864 transitions. Second operand has 10 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:19:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:57,665 INFO L93 Difference]: Finished difference Result 2273 states and 3635 transitions. [2021-11-19 13:19:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:19:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 130 [2021-11-19 13:19:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:57,682 INFO L225 Difference]: With dead ends: 2273 [2021-11-19 13:19:57,682 INFO L226 Difference]: Without dead ends: 1133 [2021-11-19 13:19:57,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:19:57,693 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 94 mSDsluCounter, 4117 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 4944 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:57,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 4944 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:19:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-11-19 13:19:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1130. [2021-11-19 13:19:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 852 states have (on average 1.57981220657277) internal successors, (1346), 888 states have internal predecessors, (1346), 218 states have call successors, (218), 56 states have call predecessors, (218), 59 states have return successors, (236), 216 states have call predecessors, (236), 216 states have call successors, (236) [2021-11-19 13:19:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1800 transitions. [2021-11-19 13:19:57,812 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1800 transitions. Word has length 130 [2021-11-19 13:19:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:57,812 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1800 transitions. [2021-11-19 13:19:57,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 13:19:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1800 transitions. [2021-11-19 13:19:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:19:57,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:57,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:57,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:58,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:58,037 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1023808048, now seen corresponding path program 1 times [2021-11-19 13:19:58,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:58,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086894509] [2021-11-19 13:19:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:58,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:58,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:58,039 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:58,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:19:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:19:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:19:58,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:19:59,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:59,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086894509] [2021-11-19 13:19:59,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086894509] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:19:59,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:19:59,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-19 13:19:59,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237172878] [2021-11-19 13:19:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:19:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:19:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:19:59,321 INFO L87 Difference]: Start difference. First operand 1130 states and 1800 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:20:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:04,267 INFO L93 Difference]: Finished difference Result 2830 states and 4558 transitions. [2021-11-19 13:20:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:20:04,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 135 [2021-11-19 13:20:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:04,286 INFO L225 Difference]: With dead ends: 2830 [2021-11-19 13:20:04,286 INFO L226 Difference]: Without dead ends: 1740 [2021-11-19 13:20:04,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:20:04,297 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 1943 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:04,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2051 Valid, 2077 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 13:20:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-11-19 13:20:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1697. [2021-11-19 13:20:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1269 states have (on average 1.5831363278171788) internal successors, (2009), 1326 states have internal predecessors, (2009), 337 states have call successors, (337), 81 states have call predecessors, (337), 90 states have return successors, (380), 338 states have call predecessors, (380), 334 states have call successors, (380) [2021-11-19 13:20:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2726 transitions. [2021-11-19 13:20:04,421 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2726 transitions. Word has length 135 [2021-11-19 13:20:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:04,422 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2726 transitions. [2021-11-19 13:20:04,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:20:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2726 transitions. [2021-11-19 13:20:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:20:04,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:04,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:04,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:04,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:04,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash -22988392, now seen corresponding path program 1 times [2021-11-19 13:20:04,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:04,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915332832] [2021-11-19 13:20:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:04,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:04,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:04,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:20:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:20:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:20:05,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:20:05,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:05,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915332832] [2021-11-19 13:20:05,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915332832] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:05,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:20:05,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 13:20:05,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061786035] [2021-11-19 13:20:05,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:05,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:05,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:20:05,702 INFO L87 Difference]: Start difference. First operand 1697 states and 2726 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:20:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:06,919 INFO L93 Difference]: Finished difference Result 4869 states and 7905 transitions. [2021-11-19 13:20:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:20:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 136 [2021-11-19 13:20:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:06,951 INFO L225 Difference]: With dead ends: 4869 [2021-11-19 13:20:06,952 INFO L226 Difference]: Without dead ends: 3212 [2021-11-19 13:20:06,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:20:06,966 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 686 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:06,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 3301 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:20:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2021-11-19 13:20:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3197. [2021-11-19 13:20:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 2372 states have (on average 1.5615514333895446) internal successors, (3704), 2482 states have internal predecessors, (3704), 652 states have call successors, (652), 162 states have call predecessors, (652), 172 states have return successors, (740), 647 states have call predecessors, (740), 646 states have call successors, (740) [2021-11-19 13:20:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 5096 transitions. [2021-11-19 13:20:07,223 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 5096 transitions. Word has length 136 [2021-11-19 13:20:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:07,223 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 5096 transitions. [2021-11-19 13:20:07,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:20:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 5096 transitions. [2021-11-19 13:20:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 13:20:07,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:07,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:07,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:07,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:07,445 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:07,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2016124973, now seen corresponding path program 1 times [2021-11-19 13:20:07,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:07,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408311119] [2021-11-19 13:20:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:07,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:07,447 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:07,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:20:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:20:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:20:08,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:20:10,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:10,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408311119] [2021-11-19 13:20:10,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408311119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:10,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:10,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-11-19 13:20:10,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635158766] [2021-11-19 13:20:10,017 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:10,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:20:10,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:20:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:10,019 INFO L87 Difference]: Start difference. First operand 3197 states and 5096 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 13:20:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:14,873 INFO L93 Difference]: Finished difference Result 12401 states and 19981 transitions. [2021-11-19 13:20:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:20:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 138 [2021-11-19 13:20:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:15,008 INFO L225 Difference]: With dead ends: 12401 [2021-11-19 13:20:15,009 INFO L226 Difference]: Without dead ends: 9244 [2021-11-19 13:20:15,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:15,032 INFO L933 BasicCegarLoop]: 1749 mSDtfsCounter, 2846 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2852 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:15,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2852 Valid, 3577 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 13:20:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-11-19 13:20:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 8364. [2021-11-19 13:20:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8364 states, 6404 states have (on average 1.5730793254216116) internal successors, (10074), 6620 states have internal predecessors, (10074), 1497 states have call successors, (1497), 432 states have call predecessors, (1497), 462 states have return successors, (1844), 1412 states have call predecessors, (1844), 1479 states have call successors, (1844) [2021-11-19 13:20:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 13415 transitions. [2021-11-19 13:20:15,789 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 13415 transitions. Word has length 138 [2021-11-19 13:20:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:15,789 INFO L470 AbstractCegarLoop]: Abstraction has 8364 states and 13415 transitions. [2021-11-19 13:20:15,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 13:20:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 13415 transitions. [2021-11-19 13:20:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:20:15,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:15,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:15,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:16,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:16,019 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1044222535, now seen corresponding path program 1 times [2021-11-19 13:20:16,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:16,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711425237] [2021-11-19 13:20:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:16,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:16,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:16,022 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:16,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:20:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:20:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:20:16,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:20:17,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:17,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711425237] [2021-11-19 13:20:17,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711425237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:17,077 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:17,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 10 [2021-11-19 13:20:17,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504096191] [2021-11-19 13:20:17,078 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:17,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:20:17,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:20:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:20:17,082 INFO L87 Difference]: Start difference. First operand 8364 states and 13415 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 13:20:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:20,483 INFO L93 Difference]: Finished difference Result 22313 states and 36313 transitions. [2021-11-19 13:20:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:20:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) Word has length 142 [2021-11-19 13:20:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:20,600 INFO L225 Difference]: With dead ends: 22313 [2021-11-19 13:20:20,601 INFO L226 Difference]: Without dead ends: 13989 [2021-11-19 13:20:20,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:20:20,720 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 1584 mSDsluCounter, 5586 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 7214 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:20,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 7214 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 13:20:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13989 states. [2021-11-19 13:20:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13989 to 13951. [2021-11-19 13:20:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13951 states, 10632 states have (on average 1.558502633559067) internal successors, (16570), 11016 states have internal predecessors, (16570), 2518 states have call successors, (2518), 726 states have call predecessors, (2518), 800 states have return successors, (3347), 2407 states have call predecessors, (3347), 2488 states have call successors, (3347) [2021-11-19 13:20:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13951 states to 13951 states and 22435 transitions. [2021-11-19 13:20:21,829 INFO L78 Accepts]: Start accepts. Automaton has 13951 states and 22435 transitions. Word has length 142 [2021-11-19 13:20:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:21,830 INFO L470 AbstractCegarLoop]: Abstraction has 13951 states and 22435 transitions. [2021-11-19 13:20:21,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 13:20:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 13951 states and 22435 transitions. [2021-11-19 13:20:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:20:21,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:21,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:21,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 13:20:22,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:22,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:22,057 INFO L85 PathProgramCache]: Analyzing trace with hash 551596361, now seen corresponding path program 1 times [2021-11-19 13:20:22,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:22,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262641106] [2021-11-19 13:20:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:22,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:22,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:22,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:22,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:20:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:20:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:20:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 13:20:23,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:23,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262641106] [2021-11-19 13:20:23,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262641106] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:23,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:20:23,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-19 13:20:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829500253] [2021-11-19 13:20:23,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:20:23,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:20:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:20:23,693 INFO L87 Difference]: Start difference. First operand 13951 states and 22435 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 13:20:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:29,473 INFO L93 Difference]: Finished difference Result 23390 states and 37401 transitions. [2021-11-19 13:20:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:20:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 142 [2021-11-19 13:20:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:29,560 INFO L225 Difference]: With dead ends: 23390 [2021-11-19 13:20:29,560 INFO L226 Difference]: Without dead ends: 14181 [2021-11-19 13:20:29,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:20:29,601 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 1935 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 4005 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 4507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 4005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:29,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2045 Valid, 2500 Invalid, 4507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 4005 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 13:20:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14181 states. [2021-11-19 13:20:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14181 to 13911. [2021-11-19 13:20:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13911 states, 10612 states have (on average 1.5576705616283453) internal successors, (16530), 10996 states have internal predecessors, (16530), 2498 states have call successors, (2498), 726 states have call predecessors, (2498), 800 states have return successors, (3327), 2387 states have call predecessors, (3327), 2468 states have call successors, (3327) [2021-11-19 13:20:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13911 states to 13911 states and 22355 transitions. [2021-11-19 13:20:30,737 INFO L78 Accepts]: Start accepts. Automaton has 13911 states and 22355 transitions. Word has length 142 [2021-11-19 13:20:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:30,737 INFO L470 AbstractCegarLoop]: Abstraction has 13911 states and 22355 transitions. [2021-11-19 13:20:30,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 13:20:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 13911 states and 22355 transitions. [2021-11-19 13:20:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:20:30,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:30,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:30,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 13:20:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:30,964 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1319937581, now seen corresponding path program 1 times [2021-11-19 13:20:30,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:30,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755247443] [2021-11-19 13:20:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:30,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:30,967 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:31,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:20:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:31,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:20:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:20:31,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 13:20:32,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:32,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755247443] [2021-11-19 13:20:32,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755247443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:32,216 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:32,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:20:32,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184929970] [2021-11-19 13:20:32,217 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:32,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:20:32,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:20:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:32,218 INFO L87 Difference]: Start difference. First operand 13911 states and 22355 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:20:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:34,298 INFO L93 Difference]: Finished difference Result 38569 states and 63055 transitions. [2021-11-19 13:20:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:20:34,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 149 [2021-11-19 13:20:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:34,494 INFO L225 Difference]: With dead ends: 38569 [2021-11-19 13:20:34,494 INFO L226 Difference]: Without dead ends: 25001 [2021-11-19 13:20:34,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:34,581 INFO L933 BasicCegarLoop]: 1639 mSDtfsCounter, 1552 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:34,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 2878 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:20:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25001 states. [2021-11-19 13:20:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25001 to 24999. [2021-11-19 13:20:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24999 states, 19016 states have (on average 1.54906394615061) internal successors, (29457), 19730 states have internal predecessors, (29457), 4536 states have call successors, (4536), 1314 states have call predecessors, (4536), 1446 states have return successors, (6621), 4349 states have call predecessors, (6621), 4482 states have call successors, (6621) [2021-11-19 13:20:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24999 states to 24999 states and 40614 transitions. [2021-11-19 13:20:36,551 INFO L78 Accepts]: Start accepts. Automaton has 24999 states and 40614 transitions. Word has length 149 [2021-11-19 13:20:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:36,552 INFO L470 AbstractCegarLoop]: Abstraction has 24999 states and 40614 transitions. [2021-11-19 13:20:36,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:20:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 24999 states and 40614 transitions. [2021-11-19 13:20:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 13:20:36,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:36,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:36,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:36,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:36,773 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:36,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1742556614, now seen corresponding path program 1 times [2021-11-19 13:20:36,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:36,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597974114] [2021-11-19 13:20:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:36,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:36,776 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:36,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:20:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:20:37,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:20:37,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 13:20:37,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:37,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597974114] [2021-11-19 13:20:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597974114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:37,807 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:37,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:20:37,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294486796] [2021-11-19 13:20:37,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:20:37,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:20:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:37,809 INFO L87 Difference]: Start difference. First operand 24999 states and 40614 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:20:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:41,266 INFO L93 Difference]: Finished difference Result 71651 states and 118814 transitions. [2021-11-19 13:20:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:20:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 150 [2021-11-19 13:20:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:41,558 INFO L225 Difference]: With dead ends: 71651 [2021-11-19 13:20:41,558 INFO L226 Difference]: Without dead ends: 47237 [2021-11-19 13:20:41,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:41,707 INFO L933 BasicCegarLoop]: 1648 mSDtfsCounter, 1560 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:41,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 2894 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:20:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47237 states. [2021-11-19 13:20:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47237 to 47235. [2021-11-19 13:20:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 35872 states have (on average 1.5428189116859947) internal successors, (55344), 37246 states have internal predecessors, (55344), 8624 states have call successors, (8624), 2490 states have call predecessors, (8624), 2738 states have return successors, (14196), 8285 states have call predecessors, (14196), 8522 states have call successors, (14196) [2021-11-19 13:20:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 78164 transitions. [2021-11-19 13:20:45,647 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 78164 transitions. Word has length 150 [2021-11-19 13:20:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:45,648 INFO L470 AbstractCegarLoop]: Abstraction has 47235 states and 78164 transitions. [2021-11-19 13:20:45,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:20:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 78164 transitions. [2021-11-19 13:20:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 13:20:45,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:45,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:45,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 13:20:45,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:45,870 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:45,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2065574354, now seen corresponding path program 1 times [2021-11-19 13:20:45,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:45,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11455014] [2021-11-19 13:20:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:45,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:45,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:45,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:20:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:46,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:20:46,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:20:46,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 13:20:46,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:46,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11455014] [2021-11-19 13:20:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11455014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:46,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 13:20:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548012789] [2021-11-19 13:20:46,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:46,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:20:46,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:20:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:46,887 INFO L87 Difference]: Start difference. First operand 47235 states and 78164 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:20:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:53,940 INFO L93 Difference]: Finished difference Result 137935 states and 234087 transitions. [2021-11-19 13:20:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:20:53,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 151 [2021-11-19 13:20:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:54,735 INFO L225 Difference]: With dead ends: 137935 [2021-11-19 13:20:54,736 INFO L226 Difference]: Without dead ends: 91769 [2021-11-19 13:20:55,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:55,428 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 1568 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:55,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 2910 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:20:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91769 states. [2021-11-19 13:21:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91769 to 91767. [2021-11-19 13:21:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91767 states, 69632 states have (on average 1.5377843520220589) internal successors, (107079), 72326 states have internal predecessors, (107079), 16812 states have call successors, (16812), 4842 states have call predecessors, (16812), 5322 states have return successors, (32343), 16169 states have call predecessors, (32343), 16614 states have call successors, (32343) [2021-11-19 13:21:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91767 states to 91767 states and 156234 transitions. [2021-11-19 13:21:02,423 INFO L78 Accepts]: Start accepts. Automaton has 91767 states and 156234 transitions. Word has length 151 [2021-11-19 13:21:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:02,424 INFO L470 AbstractCegarLoop]: Abstraction has 91767 states and 156234 transitions. [2021-11-19 13:21:02,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:21:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 91767 states and 156234 transitions. [2021-11-19 13:21:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 13:21:02,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:02,431 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:21:02,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 13:21:02,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:21:02,645 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash -195765439, now seen corresponding path program 1 times [2021-11-19 13:21:02,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:21:02,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484980102] [2021-11-19 13:21:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:02,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:21:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:21:02,649 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:21:02,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de885f0-63ef-40fb-9313-22a6ca1004bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:21:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:21:02,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:21:03,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 13:21:04,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:21:04,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484980102] [2021-11-19 13:21:04,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484980102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:04,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:04,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 13 [2021-11-19 13:21:04,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551535926] [2021-11-19 13:21:04,570 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:04,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:21:04,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:21:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:21:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:21:04,572 INFO L87 Difference]: Start difference. First operand 91767 states and 156234 transitions. Second operand has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 7 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-19 13:21:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:16,494 INFO L93 Difference]: Finished difference Result 216915 states and 366839 transitions. [2021-11-19 13:21:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:21:16,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 7 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 152 [2021-11-19 13:21:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:17,780 INFO L225 Difference]: With dead ends: 216915 [2021-11-19 13:21:17,780 INFO L226 Difference]: Without dead ends: 156453 [2021-11-19 13:21:18,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:21:18,362 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 1212 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 4609 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:18,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 4609 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 13:21:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156453 states.