./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:13:58,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:13:58,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:13:58,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:13:58,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:13:58,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:13:58,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:13:58,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:13:58,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:13:58,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:13:58,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:13:58,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:13:58,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:13:58,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:13:58,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:13:58,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:13:58,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:13:58,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:13:58,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:13:58,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:13:58,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:13:58,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:13:58,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:13:58,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:13:58,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:13:58,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:13:58,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:13:58,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:13:58,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:13:58,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:13:58,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:13:58,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:13:58,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:13:58,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:13:58,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:13:58,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:13:58,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:13:58,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:13:58,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:13:58,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:13:58,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:13:58,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:13:58,850 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:13:58,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:13:58,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:13:58,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:13:58,853 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:13:58,853 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:13:58,854 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:13:58,854 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:13:58,860 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:13:58,860 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:13:58,861 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:13:58,862 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:13:58,862 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:13:58,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:13:58,863 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:13:58,863 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:13:58,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:13:58,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:13:58,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:13:58,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:13:58,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:13:58,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:13:58,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:13:58,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:13:58,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:13:58,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:13:58,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:13:58,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:13:58,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:13:58,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:13:58,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:13:58,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:13:58,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:13:58,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:13:58,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:13:58,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:13:58,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:13:58,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:13:58,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:13:58,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:13:58,870 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2021-11-19 14:13:59,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:13:59,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:13:59,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:13:59,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:13:59,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:13:59,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-19 14:13:59,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/9cafc741b/23607538f38248adbcc91eb4eb038d14/FLAG33976b11a [2021-11-19 14:14:00,045 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:00,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-19 14:14:00,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/9cafc741b/23607538f38248adbcc91eb4eb038d14/FLAG33976b11a [2021-11-19 14:14:00,193 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/9cafc741b/23607538f38248adbcc91eb4eb038d14 [2021-11-19 14:14:00,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:00,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:00,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:00,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:00,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:00,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:00" (1/1) ... [2021-11-19 14:14:00,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f3d66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:00, skipping insertion in model container [2021-11-19 14:14:00,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:00" (1/1) ... [2021-11-19 14:14:00,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:00,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:01,031 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-19 14:14:01,036 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:01,053 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 14:14:01,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4aafef1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:01, skipping insertion in model container [2021-11-19 14:14:01,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:01,055 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:01,057 INFO L158 Benchmark]: Toolchain (without parser) took 859.04ms. Allocated memory is still 125.8MB. Free memory was 84.0MB in the beginning and 85.2MB in the end (delta: -1.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 14:14:01,058 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 125.8MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:01,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 849.39ms. Allocated memory is still 125.8MB. Free memory was 83.8MB in the beginning and 85.2MB in the end (delta: -1.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:01,060 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 125.8MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 849.39ms. Allocated memory is still 125.8MB. Free memory was 83.8MB in the beginning and 85.2MB in the end (delta: -1.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 745]: 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:03,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:03,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:03,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:03,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:03,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:03,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:03,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:03,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:03,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:03,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:03,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:03,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:03,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:03,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:03,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:03,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:03,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:03,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:03,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:03,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:03,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:03,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:03,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:03,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:03,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:03,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:03,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:03,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:03,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:03,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:03,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:03,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:03,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:03,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:03,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:03,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:03,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:03,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:03,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:03,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:03,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:03,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:03,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:03,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:03,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:03,611 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:03,611 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:03,611 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:03,611 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:03,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:03,612 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:03,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:03,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:03,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:03,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:03,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:03,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:03,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:03,616 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:03,616 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:03,617 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:03,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:03,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:03,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:03,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:03,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:03,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:03,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:03,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:03,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:03,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:03,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:03,620 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:03,620 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:03,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:03,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:03,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:03,621 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2021-11-19 14:14:03,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:04,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:04,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:04,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:04,033 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:04,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-19 14:14:04,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/12d71665c/9ae04b46b63d43968d0b789f9e9327b9/FLAG24a9e9825 [2021-11-19 14:14:04,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:04,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-19 14:14:04,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/12d71665c/9ae04b46b63d43968d0b789f9e9327b9/FLAG24a9e9825 [2021-11-19 14:14:04,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/data/12d71665c/9ae04b46b63d43968d0b789f9e9327b9 [2021-11-19 14:14:04,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:04,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:04,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:04,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:04,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:04,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:04" (1/1) ... [2021-11-19 14:14:04,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b4e114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:04, skipping insertion in model container [2021-11-19 14:14:04,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:04" (1/1) ... [2021-11-19 14:14:05,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:05,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:05,862 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-19 14:14:05,866 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:05,878 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:05,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:06,081 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-19 14:14:06,086 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,094 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:06,221 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_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-19 14:14:06,222 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,257 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:06,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06 WrapperNode [2021-11-19 14:14:06,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:06,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:06,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:06,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:06,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,371 INFO L137 Inliner]: procedures = 96, calls = 342, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 843 [2021-11-19 14:14:06,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:06,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:06,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:06,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:06,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:06,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:06,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:06,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:06,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:06,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:06,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:06,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:06,553 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:14:06,554 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:14:06,554 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:14:06,554 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:14:06,554 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:14:06,554 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:14:06,554 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:06,555 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:06,555 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:14:06,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:14:06,555 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:06,555 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:06,555 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:14:06,556 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:14:06,556 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:06,556 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:06,556 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:14:06,556 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:14:06,556 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:06,557 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:06,557 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:06,557 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:06,557 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:06,557 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:06,557 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:06,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:06,558 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:06,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:06,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:06,558 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:14:06,559 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:14:06,559 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:06,559 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:06,559 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:06,559 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:06,559 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:14:06,561 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:14:06,561 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:06,561 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:06,561 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:06,562 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:06,563 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:06,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:06,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:06,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:06,815 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:06,832 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:08,223 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:08,249 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:08,250 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:08,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:08 BoogieIcfgContainer [2021-11-19 14:14:08,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:08,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:08,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:08,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:08,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:04" (1/3) ... [2021-11-19 14:14:08,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f8df7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:08, skipping insertion in model container [2021-11-19 14:14:08,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (2/3) ... [2021-11-19 14:14:08,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f8df7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:08, skipping insertion in model container [2021-11-19 14:14:08,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:08" (3/3) ... [2021-11-19 14:14:08,263 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2021-11-19 14:14:08,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:08,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:08,350 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:08,366 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 14:14:08,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 568 states, 442 states have (on average 1.667420814479638) internal successors, (737), 458 states have internal predecessors, (737), 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 14:14:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:14:08,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:08,474 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 14:14:08,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash -575617612, now seen corresponding path program 1 times [2021-11-19 14:14:08,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:08,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017961276] [2021-11-19 14:14:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:08,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:08,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:08,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:08,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:09,327 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 14:14:09,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:09,726 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 14:14:09,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:09,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017961276] [2021-11-19 14:14:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017961276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:09,729 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:09,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:09,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176819647] [2021-11-19 14:14:09,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:09,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:09,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:09,782 INFO L87 Difference]: Start difference. First operand has 568 states, 442 states have (on average 1.667420814479638) internal successors, (737), 458 states have internal predecessors, (737), 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 14:14:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:10,047 INFO L93 Difference]: Finished difference Result 1131 states and 1872 transitions. [2021-11-19 14:14:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:10,050 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 14:14:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:10,072 INFO L225 Difference]: With dead ends: 1131 [2021-11-19 14:14:10,072 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 14:14:10,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 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 14:14:10,091 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 16 mSDsluCounter, 3654 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4571 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:10,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 4571 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 14:14:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 14:14:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6461187214611872) internal successors, (721), 453 states have internal predecessors, (721), 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 14:14:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 918 transitions. [2021-11-19 14:14:10,193 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 918 transitions. Word has length 103 [2021-11-19 14:14:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:10,193 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 918 transitions. [2021-11-19 14:14:10,194 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 14:14:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 918 transitions. [2021-11-19 14:14:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:14:10,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:10,208 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 14:14:10,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:10,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:10,428 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1264588500, now seen corresponding path program 1 times [2021-11-19 14:14:10,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:10,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39856647] [2021-11-19 14:14:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:10,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:10,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:10,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:11,079 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 14:14:11,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:11,508 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 14:14:11,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39856647] [2021-11-19 14:14:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39856647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:11,510 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:11,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:11,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997465413] [2021-11-19 14:14:11,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:11,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:11,514 INFO L87 Difference]: Start difference. First operand 563 states and 918 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 14:14:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:11,797 INFO L93 Difference]: Finished difference Result 1114 states and 1828 transitions. [2021-11-19 14:14:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:11,799 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 14:14:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:11,806 INFO L225 Difference]: With dead ends: 1114 [2021-11-19 14:14:11,807 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:14:11,811 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 14:14:11,813 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 213 mSDsluCounter, 6286 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 7188 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:11,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 7188 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:14:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-19 14:14:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 446 states have (on average 1.6457399103139014) internal successors, (734), 462 states have internal predecessors, (734), 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 14:14:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 932 transitions. [2021-11-19 14:14:11,856 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 932 transitions. Word has length 108 [2021-11-19 14:14:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:11,857 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 932 transitions. [2021-11-19 14:14:11,858 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 14:14:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 932 transitions. [2021-11-19 14:14:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:14:11,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:11,863 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 14:14:11,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:12,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:12,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash 440907976, now seen corresponding path program 1 times [2021-11-19 14:14:12,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:12,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267927192] [2021-11-19 14:14:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:12,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:12,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:12,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:12,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:12,683 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 14:14:12,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:13,042 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 14:14:13,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:13,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267927192] [2021-11-19 14:14:13,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267927192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:13,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:13,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:13,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912274738] [2021-11-19 14:14:13,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:13,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:13,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:13,051 INFO L87 Difference]: Start difference. First operand 572 states and 932 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 14:14:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:13,349 INFO L93 Difference]: Finished difference Result 1170 states and 1919 transitions. [2021-11-19 14:14:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:13,351 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 14:14:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:13,356 INFO L225 Difference]: With dead ends: 1170 [2021-11-19 14:14:13,356 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:14:13,360 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 14:14:13,361 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 136 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:13,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2563 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:14:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 577. [2021-11-19 14:14:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.58980044345898) internal successors, (717), 466 states have internal predecessors, (717), 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 14:14:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 914 transitions. [2021-11-19 14:14:13,393 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 914 transitions. Word has length 109 [2021-11-19 14:14:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:13,394 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 914 transitions. [2021-11-19 14:14:13,394 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 14:14:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 914 transitions. [2021-11-19 14:14:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:14:13,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:13,399 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 14:14:13,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:13,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:13,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash -294243923, now seen corresponding path program 1 times [2021-11-19 14:14:13,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:13,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22166060] [2021-11-19 14:14:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:13,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:13,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:13,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:14,165 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 14:14:14,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:14,534 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 14:14:14,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22166060] [2021-11-19 14:14:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22166060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:14,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:14,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:14:14,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143325250] [2021-11-19 14:14:14,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:14,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:14,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:14,538 INFO L87 Difference]: Start difference. First operand 577 states and 914 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 14:14:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:14,696 INFO L93 Difference]: Finished difference Result 1112 states and 1782 transitions. [2021-11-19 14:14:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:14,697 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 14:14:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:14,702 INFO L225 Difference]: With dead ends: 1112 [2021-11-19 14:14:14,703 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 14:14:14,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:14,707 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 137 mSDsluCounter, 3489 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4372 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:14,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4372 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 14:14:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 556. [2021-11-19 14:14:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 430 states have (on average 1.6023255813953488) internal successors, (689), 445 states have internal predecessors, (689), 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 14:14:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 886 transitions. [2021-11-19 14:14:14,738 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 886 transitions. Word has length 111 [2021-11-19 14:14:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:14,739 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 886 transitions. [2021-11-19 14:14:14,739 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 14:14:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 886 transitions. [2021-11-19 14:14:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:14:14,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:14,743 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 14:14:14,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:14,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:14,958 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1806432231, now seen corresponding path program 1 times [2021-11-19 14:14:14,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:14,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634430776] [2021-11-19 14:14:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:14,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:14,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:14,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:15,544 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 14:14:15,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:16,093 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 14:14:16,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:16,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634430776] [2021-11-19 14:14:16,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634430776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:16,094 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:16,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:14:16,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054967549] [2021-11-19 14:14:16,095 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:16,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:14:16,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:14:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:16,096 INFO L87 Difference]: Start difference. First operand 556 states and 886 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 14:14:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:16,469 INFO L93 Difference]: Finished difference Result 1081 states and 1737 transitions. [2021-11-19 14:14:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:16,471 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 14:14:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:16,477 INFO L225 Difference]: With dead ends: 1081 [2021-11-19 14:14:16,477 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 14:14:16,481 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 14:14:16,482 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 74 mSDsluCounter, 6710 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7553 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:16,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 7553 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 14:14:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 558. [2021-11-19 14:14:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 432 states have (on average 1.5972222222222223) internal successors, (690), 447 states have internal predecessors, (690), 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 14:14:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 887 transitions. [2021-11-19 14:14:16,513 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 887 transitions. Word has length 114 [2021-11-19 14:14:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:16,514 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 887 transitions. [2021-11-19 14:14:16,514 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 14:14:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 887 transitions. [2021-11-19 14:14:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:14:16,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:16,520 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 14:14:16,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:16,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 983081671, now seen corresponding path program 1 times [2021-11-19 14:14:16,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:16,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210675151] [2021-11-19 14:14:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:16,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:16,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:16,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:17,415 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 14:14:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:17,819 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 14:14:17,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:17,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210675151] [2021-11-19 14:14:17,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210675151] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:17,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:17,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:17,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700903663] [2021-11-19 14:14:17,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:17,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:17,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:17,823 INFO L87 Difference]: Start difference. First operand 558 states and 887 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 14:14:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:18,944 INFO L93 Difference]: Finished difference Result 1077 states and 1758 transitions. [2021-11-19 14:14:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:18,945 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 14:14:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:18,950 INFO L225 Difference]: With dead ends: 1077 [2021-11-19 14:14:18,951 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 14:14:18,956 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 14:14:18,962 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 819 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:18,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 2140 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 14:14:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 14:14:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 435 states have (on average 1.5931034482758621) internal successors, (693), 450 states have internal predecessors, (693), 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 14:14:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 891 transitions. [2021-11-19 14:14:19,008 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 891 transitions. Word has length 115 [2021-11-19 14:14:19,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:19,009 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 891 transitions. [2021-11-19 14:14:19,009 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 14:14:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 891 transitions. [2021-11-19 14:14:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:14:19,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:19,015 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 14:14:19,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:19,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:19,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1361102837, now seen corresponding path program 1 times [2021-11-19 14:14:19,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:19,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429544732] [2021-11-19 14:14:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:19,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:19,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:19,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:19,874 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 14:14:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:20,307 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 14:14:20,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:20,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429544732] [2021-11-19 14:14:20,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429544732] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:20,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:20,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:20,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645102538] [2021-11-19 14:14:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:20,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:20,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:20,310 INFO L87 Difference]: Start difference. First operand 562 states and 891 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 14:14:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:21,401 INFO L93 Difference]: Finished difference Result 1086 states and 1765 transitions. [2021-11-19 14:14:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:21,402 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 14:14:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:21,416 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 14:14:21,416 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:14:21,423 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 14:14:21,427 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 817 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:21,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 2141 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:14:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:14:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 439 states have (on average 1.5876993166287017) internal successors, (697), 454 states have internal predecessors, (697), 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 14:14:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 896 transitions. [2021-11-19 14:14:21,493 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 896 transitions. Word has length 118 [2021-11-19 14:14:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:21,494 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 896 transitions. [2021-11-19 14:14:21,494 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 14:14:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 896 transitions. [2021-11-19 14:14:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:14:21,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:21,500 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 14:14:21,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:21,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:21,721 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash 557854339, now seen corresponding path program 1 times [2021-11-19 14:14:21,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:21,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079352714] [2021-11-19 14:14:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:21,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:21,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:21,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:21,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:14:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:22,379 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 14:14:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:22,794 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 14:14:22,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:22,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079352714] [2021-11-19 14:14:22,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079352714] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:22,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:22,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:22,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089757555] [2021-11-19 14:14:22,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:22,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:22,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:22,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:22,798 INFO L87 Difference]: Start difference. First operand 567 states and 896 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 14:14:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:23,675 INFO L93 Difference]: Finished difference Result 1097 states and 1774 transitions. [2021-11-19 14:14:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:23,676 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 14:14:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:23,681 INFO L225 Difference]: With dead ends: 1097 [2021-11-19 14:14:23,682 INFO L226 Difference]: Without dead ends: 573 [2021-11-19 14:14:23,687 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 14:14:23,688 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 817 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:23,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 2141 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:14:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-19 14:14:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-19 14:14:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 444 states have (on average 1.5810810810810811) internal successors, (702), 459 states have internal predecessors, (702), 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 14:14:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 902 transitions. [2021-11-19 14:14:23,743 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 902 transitions. Word has length 121 [2021-11-19 14:14:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:23,744 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 902 transitions. [2021-11-19 14:14:23,744 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 14:14:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 902 transitions. [2021-11-19 14:14:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:14:23,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:23,752 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 14:14:23,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:23,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:23,969 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash -458123991, now seen corresponding path program 1 times [2021-11-19 14:14:23,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:23,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956087731] [2021-11-19 14:14:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:23,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:23,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:23,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:23,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:24,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:24,523 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 14:14:24,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:24,932 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 14:14:24,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:24,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956087731] [2021-11-19 14:14:24,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956087731] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:24,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:24,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:24,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775350708] [2021-11-19 14:14:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:24,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:24,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:24,934 INFO L87 Difference]: Start difference. First operand 573 states and 902 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 14:14:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:25,859 INFO L93 Difference]: Finished difference Result 1110 states and 1785 transitions. [2021-11-19 14:14:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:25,860 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 14:14:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:25,866 INFO L225 Difference]: With dead ends: 1110 [2021-11-19 14:14:25,866 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 14:14:25,871 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 14:14:25,872 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 809 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:25,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2141 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:14:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 14:14:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-19 14:14:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 450 states have (on average 1.5733333333333333) internal successors, (708), 465 states have internal predecessors, (708), 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 14:14:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 909 transitions. [2021-11-19 14:14:25,904 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 909 transitions. Word has length 124 [2021-11-19 14:14:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:25,906 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 909 transitions. [2021-11-19 14:14:25,906 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 14:14:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 909 transitions. [2021-11-19 14:14:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:14:25,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:25,912 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 14:14:25,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:26,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:26,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 698932287, now seen corresponding path program 1 times [2021-11-19 14:14:26,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:26,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813540423] [2021-11-19 14:14:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:26,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:26,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:26,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:26,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:14:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:14:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:26,786 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 14:14:26,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:27,405 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 14:14:27,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:27,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813540423] [2021-11-19 14:14:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813540423] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:27,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:27,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-19 14:14:27,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149058630] [2021-11-19 14:14:27,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:27,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:14:27,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:14:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:27,408 INFO L87 Difference]: Start difference. First operand 580 states and 909 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 14:14:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:35,063 INFO L93 Difference]: Finished difference Result 1950 states and 3138 transitions. [2021-11-19 14:14:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:14:35,070 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 14:14:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:35,084 INFO L225 Difference]: With dead ends: 1950 [2021-11-19 14:14:35,085 INFO L226 Difference]: Without dead ends: 1413 [2021-11-19 14:14:35,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:14:35,091 INFO L933 BasicCegarLoop]: 1471 mSDtfsCounter, 1715 mSDsluCounter, 2708 mSDsCounter, 0 mSdLazyCounter, 5135 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 5808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 5135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:35,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1825 Valid, 4179 Invalid, 5808 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [673 Valid, 5135 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-19 14:14:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-11-19 14:14:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1191. [2021-11-19 14:14:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 902 states have (on average 1.5776053215077606) internal successors, (1423), 939 states have internal predecessors, (1423), 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 14:14:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1896 transitions. [2021-11-19 14:14:35,204 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1896 transitions. Word has length 127 [2021-11-19 14:14:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:35,205 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1896 transitions. [2021-11-19 14:14:35,205 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 14:14:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1896 transitions. [2021-11-19 14:14:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:14:35,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:35,214 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 14:14:35,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:35,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:35,430 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:35,431 INFO L85 PathProgramCache]: Analyzing trace with hash -606377829, now seen corresponding path program 1 times [2021-11-19 14:14:35,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:35,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165596595] [2021-11-19 14:14:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:35,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:35,432 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:35,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:14:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:35,996 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 14:14:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:36,460 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 14:14:36,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:36,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165596595] [2021-11-19 14:14:36,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165596595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:36,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:36,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:14:36,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83461059] [2021-11-19 14:14:36,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:36,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:14:36,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:14:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:36,463 INFO L87 Difference]: Start difference. First operand 1191 states and 1896 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 14:14:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:36,752 INFO L93 Difference]: Finished difference Result 2309 states and 3699 transitions. [2021-11-19 14:14:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:14:36,754 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 14:14:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:36,766 INFO L225 Difference]: With dead ends: 2309 [2021-11-19 14:14:36,766 INFO L226 Difference]: Without dead ends: 1151 [2021-11-19 14:14:36,800 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 14:14:36,801 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 57 mSDsluCounter, 6685 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 7528 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:36,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 7528 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-19 14:14:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1148. [2021-11-19 14:14:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 870 states have (on average 1.5839080459770114) internal successors, (1378), 906 states have internal predecessors, (1378), 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 14:14:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1832 transitions. [2021-11-19 14:14:36,871 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1832 transitions. Word has length 130 [2021-11-19 14:14:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:36,872 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 1832 transitions. [2021-11-19 14:14:36,872 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 14:14:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1832 transitions. [2021-11-19 14:14:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 14:14:36,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:36,877 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 14:14:36,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:37,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:37,097 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash -10164912, now seen corresponding path program 1 times [2021-11-19 14:14:37,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:37,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548607585] [2021-11-19 14:14:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:37,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:37,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:37,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:37,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:14:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:14:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:37,815 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 14:14:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:38,436 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 14:14:38,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:38,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548607585] [2021-11-19 14:14:38,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548607585] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:38,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:38,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-19 14:14:38,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509060884] [2021-11-19 14:14:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:38,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:38,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:38,440 INFO L87 Difference]: Start difference. First operand 1148 states and 1832 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 14:14:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:42,841 INFO L93 Difference]: Finished difference Result 2875 states and 4638 transitions. [2021-11-19 14:14:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:42,843 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 14:14:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:42,858 INFO L225 Difference]: With dead ends: 2875 [2021-11-19 14:14:42,858 INFO L226 Difference]: Without dead ends: 1767 [2021-11-19 14:14:42,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:14:42,867 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 1991 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 2998 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 2998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:42,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2099 Valid, 2050 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 2998 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 14:14:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-11-19 14:14:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1724. [2021-11-19 14:14:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1296 states have (on average 1.5871913580246915) internal successors, (2057), 1353 states have internal predecessors, (2057), 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 14:14:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2774 transitions. [2021-11-19 14:14:42,981 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2774 transitions. Word has length 135 [2021-11-19 14:14:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:42,981 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2774 transitions. [2021-11-19 14:14:42,981 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 14:14:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2774 transitions. [2021-11-19 14:14:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:14:42,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:42,986 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 14:14:43,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:43,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:43,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash -135176152, now seen corresponding path program 1 times [2021-11-19 14:14:43,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:43,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815292009] [2021-11-19 14:14:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:43,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:43,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:43,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:14:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:14:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:43,793 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 14:14:43,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:44,196 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 14:14:44,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:44,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815292009] [2021-11-19 14:14:44,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815292009] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:44,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:44,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 14:14:44,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965254652] [2021-11-19 14:14:44,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:44,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:44,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:44,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:44,199 INFO L87 Difference]: Start difference. First operand 1724 states and 2774 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 14:14:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:45,205 INFO L93 Difference]: Finished difference Result 4950 states and 8049 transitions. [2021-11-19 14:14:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:45,206 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 14:14:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:45,234 INFO L225 Difference]: With dead ends: 4950 [2021-11-19 14:14:45,234 INFO L226 Difference]: Without dead ends: 3266 [2021-11-19 14:14:45,247 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 14:14:45,248 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 715 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 2869 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 2869 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:14:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2021-11-19 14:14:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 3251. [2021-11-19 14:14:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2426 states have (on average 1.5663643858202803) internal successors, (3800), 2536 states have internal predecessors, (3800), 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 14:14:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 5192 transitions. [2021-11-19 14:14:45,452 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 5192 transitions. Word has length 136 [2021-11-19 14:14:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:45,453 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 5192 transitions. [2021-11-19 14:14:45,453 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 14:14:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 5192 transitions. [2021-11-19 14:14:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 14:14:45,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:45,458 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 14:14:45,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:45,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,685 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:45,686 INFO L85 PathProgramCache]: Analyzing trace with hash -903525821, now seen corresponding path program 1 times [2021-11-19 14:14:45,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:45,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342538536] [2021-11-19 14:14:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:45,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:14:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:46,650 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 14:14:46,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:48,289 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 14:14:48,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:48,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342538536] [2021-11-19 14:14:48,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342538536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:48,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:48,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-11-19 14:14:48,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610029789] [2021-11-19 14:14:48,290 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:48,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:48,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:48,292 INFO L87 Difference]: Start difference. First operand 3251 states and 5192 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 14:14:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:54,620 INFO L93 Difference]: Finished difference Result 12509 states and 20173 transitions. [2021-11-19 14:14:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:54,627 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 14:14:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:54,712 INFO L225 Difference]: With dead ends: 12509 [2021-11-19 14:14:54,712 INFO L226 Difference]: Without dead ends: 9298 [2021-11-19 14:14:54,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:54,739 INFO L933 BasicCegarLoop]: 1761 mSDtfsCounter, 2235 mSDsluCounter, 3588 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 5349 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:54,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 5349 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-19 14:14:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9298 states. [2021-11-19 14:14:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9298 to 8418. [2021-11-19 14:14:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 6458 states have (on average 1.5747909569526168) internal successors, (10170), 6674 states have internal predecessors, (10170), 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 14:14:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 13511 transitions. [2021-11-19 14:14:55,415 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 13511 transitions. Word has length 138 [2021-11-19 14:14:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 8418 states and 13511 transitions. [2021-11-19 14:14:55,417 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 14:14:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 13511 transitions. [2021-11-19 14:14:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:14:55,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:55,427 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 14:14:55,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:55,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:55,646 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash 965099701, now seen corresponding path program 1 times [2021-11-19 14:14:55,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:55,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006274131] [2021-11-19 14:14:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:55,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:55,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:55,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:55,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:14:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:14:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:56,218 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 14:14:56,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:56,616 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 14:14:56,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:56,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006274131] [2021-11-19 14:14:56,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006274131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:56,617 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:56,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 10 [2021-11-19 14:14:56,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308579628] [2021-11-19 14:14:56,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:56,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:14:56,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:14:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:56,622 INFO L87 Difference]: Start difference. First operand 8418 states and 13511 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 14:14:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:59,740 INFO L93 Difference]: Finished difference Result 22475 states and 36637 transitions. [2021-11-19 14:14:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:59,747 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 14:14:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:59,868 INFO L225 Difference]: With dead ends: 22475 [2021-11-19 14:14:59,868 INFO L226 Difference]: Without dead ends: 14097 [2021-11-19 14:14:59,933 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 14:14:59,934 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 3439 mSDsluCounter, 4469 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 6135 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3443 Valid, 6135 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:14:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14097 states. [2021-11-19 14:15:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14097 to 14059. [2021-11-19 14:15:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14059 states, 10740 states have (on average 1.560707635009311) internal successors, (16762), 11124 states have internal predecessors, (16762), 2518 states have call successors, (2518), 726 states have call predecessors, (2518), 800 states have return successors, (3383), 2407 states have call predecessors, (3383), 2488 states have call successors, (3383) [2021-11-19 14:15:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14059 states to 14059 states and 22663 transitions. [2021-11-19 14:15:00,954 INFO L78 Accepts]: Start accepts. Automaton has 14059 states and 22663 transitions. Word has length 142 [2021-11-19 14:15:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:00,954 INFO L470 AbstractCegarLoop]: Abstraction has 14059 states and 22663 transitions. [2021-11-19 14:15:00,955 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 14:15:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14059 states and 22663 transitions. [2021-11-19 14:15:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:15:00,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:00,959 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 14:15:00,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:01,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,195 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash 472473527, now seen corresponding path program 1 times [2021-11-19 14:15:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:01,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010627341] [2021-11-19 14:15:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:01,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:01,197 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:01,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:15:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:01,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:15:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:01,781 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 14:15:01,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:02,529 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 14:15:02,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:02,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010627341] [2021-11-19 14:15:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010627341] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:02,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-19 14:15:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765991761] [2021-11-19 14:15:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:02,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:15:02,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:15:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:15:02,532 INFO L87 Difference]: Start difference. First operand 14059 states and 22663 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 14:15:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:08,392 INFO L93 Difference]: Finished difference Result 23552 states and 37743 transitions. [2021-11-19 14:15:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:15:08,393 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 14:15:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:08,468 INFO L225 Difference]: With dead ends: 23552 [2021-11-19 14:15:08,468 INFO L226 Difference]: Without dead ends: 14289 [2021-11-19 14:15:08,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:15:08,510 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1961 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:08,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2071 Valid, 2680 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 4543 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-19 14:15:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14289 states. [2021-11-19 14:15:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14289 to 14019. [2021-11-19 14:15:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14019 states, 10720 states have (on average 1.5598880597014926) internal successors, (16722), 11104 states have internal predecessors, (16722), 2498 states have call successors, (2498), 726 states have call predecessors, (2498), 800 states have return successors, (3363), 2387 states have call predecessors, (3363), 2468 states have call successors, (3363) [2021-11-19 14:15:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14019 states to 14019 states and 22583 transitions. [2021-11-19 14:15:09,423 INFO L78 Accepts]: Start accepts. Automaton has 14019 states and 22583 transitions. Word has length 142 [2021-11-19 14:15:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:09,424 INFO L470 AbstractCegarLoop]: Abstraction has 14019 states and 22583 transitions. [2021-11-19 14:15:09,424 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 14:15:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 14019 states and 22583 transitions. [2021-11-19 14:15:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:15:09,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:09,431 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] [2021-11-19 14:15:09,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:09,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,646 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash 227514839, now seen corresponding path program 1 times [2021-11-19 14:15:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:09,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226549548] [2021-11-19 14:15:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:09,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:09,649 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:09,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:15:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:10,426 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 14:15:10,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:10,775 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 14:15:10,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:10,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226549548] [2021-11-19 14:15:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226549548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:10,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:10,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:15:10,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515648296] [2021-11-19 14:15:10,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:10,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:10,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:10,777 INFO L87 Difference]: Start difference. First operand 14019 states and 22583 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 14:15:12,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:12,855 INFO L93 Difference]: Finished difference Result 38893 states and 63820 transitions. [2021-11-19 14:15:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:12,858 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 14:15:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:13,020 INFO L225 Difference]: With dead ends: 38893 [2021-11-19 14:15:13,021 INFO L226 Difference]: Without dead ends: 25217 [2021-11-19 14:15:13,105 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 14:15:13,106 INFO L933 BasicCegarLoop]: 1677 mSDtfsCounter, 1588 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:13,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 2946 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:15:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25217 states. [2021-11-19 14:15:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25217 to 25215. [2021-11-19 14:15:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25215 states, 19232 states have (on average 1.5516326955074875) internal successors, (29841), 19946 states have internal predecessors, (29841), 4536 states have call successors, (4536), 1314 states have call predecessors, (4536), 1446 states have return successors, (6774), 4349 states have call predecessors, (6774), 4482 states have call successors, (6774) [2021-11-19 14:15:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25215 states to 25215 states and 41151 transitions. [2021-11-19 14:15:15,175 INFO L78 Accepts]: Start accepts. Automaton has 25215 states and 41151 transitions. Word has length 149 [2021-11-19 14:15:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:15,176 INFO L470 AbstractCegarLoop]: Abstraction has 25215 states and 41151 transitions. [2021-11-19 14:15:15,177 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 14:15:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25215 states and 41151 transitions. [2021-11-19 14:15:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:15:15,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:15,184 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 14:15:15,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:15,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:15,403 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1266175128, now seen corresponding path program 1 times [2021-11-19 14:15:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:15,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476734650] [2021-11-19 14:15:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:15,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:15,405 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:15,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:15:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:16,253 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 14:15:16,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:16,569 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 14:15:16,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:16,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476734650] [2021-11-19 14:15:16,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476734650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:16,570 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:16,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:15:16,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639787591] [2021-11-19 14:15:16,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:16,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:16,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:16,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:16,573 INFO L87 Difference]: Start difference. First operand 25215 states and 41151 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 14:15:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:20,058 INFO L93 Difference]: Finished difference Result 72299 states and 120808 transitions. [2021-11-19 14:15:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:20,060 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 14:15:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:20,324 INFO L225 Difference]: With dead ends: 72299 [2021-11-19 14:15:20,324 INFO L226 Difference]: Without dead ends: 47669 [2021-11-19 14:15:20,490 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 14:15:20,490 INFO L933 BasicCegarLoop]: 1686 mSDtfsCounter, 1596 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:20,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 2962 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:15:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47669 states. [2021-11-19 14:15:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47669 to 47667. [2021-11-19 14:15:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47667 states, 36304 states have (on average 1.5456148082855883) internal successors, (56112), 37678 states have internal predecessors, (56112), 8624 states have call successors, (8624), 2490 states have call predecessors, (8624), 2738 states have return successors, (14898), 8285 states have call predecessors, (14898), 8522 states have call successors, (14898) [2021-11-19 14:15:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47667 states to 47667 states and 79634 transitions. [2021-11-19 14:15:24,296 INFO L78 Accepts]: Start accepts. Automaton has 47667 states and 79634 transitions. Word has length 150 [2021-11-19 14:15:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:24,297 INFO L470 AbstractCegarLoop]: Abstraction has 47667 states and 79634 transitions. [2021-11-19 14:15:24,297 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 14:15:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 47667 states and 79634 transitions. [2021-11-19 14:15:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:15:24,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:24,304 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 14:15:24,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:24,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:24,523 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -364720644, now seen corresponding path program 1 times [2021-11-19 14:15:24,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:24,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930498423] [2021-11-19 14:15:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:24,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:24,525 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:24,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:15:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:24,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:25,140 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 14:15:25,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:25,412 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 14:15:25,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:25,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930498423] [2021-11-19 14:15:25,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930498423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:25,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:25,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:15:25,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911450437] [2021-11-19 14:15:25,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:25,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:25,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:25,415 INFO L87 Difference]: Start difference. First operand 47667 states and 79634 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 14:15:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:32,606 INFO L93 Difference]: Finished difference Result 139231 states and 240518 transitions. [2021-11-19 14:15:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:32,608 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 14:15:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:33,209 INFO L225 Difference]: With dead ends: 139231 [2021-11-19 14:15:33,210 INFO L226 Difference]: Without dead ends: 92633 [2021-11-19 14:15:33,855 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 14:15:33,856 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 1604 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:33,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 2978 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:15:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92633 states. [2021-11-19 14:15:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92633 to 92631. [2021-11-19 14:15:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92631 states, 70496 states have (on average 1.5407257149341806) internal successors, (108615), 73190 states have internal predecessors, (108615), 16812 states have call successors, (16812), 4842 states have call predecessors, (16812), 5322 states have return successors, (35898), 16169 states have call predecessors, (35898), 16614 states have call successors, (35898) [2021-11-19 14:15:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92631 states to 92631 states and 161325 transitions. [2021-11-19 14:15:41,260 INFO L78 Accepts]: Start accepts. Automaton has 92631 states and 161325 transitions. Word has length 151 [2021-11-19 14:15:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:41,261 INFO L470 AbstractCegarLoop]: Abstraction has 92631 states and 161325 transitions. [2021-11-19 14:15:41,261 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 14:15:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 92631 states and 161325 transitions. [2021-11-19 14:15:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:15:41,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:41,269 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 14:15:41,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:41,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:41,482 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1756249071, now seen corresponding path program 1 times [2021-11-19 14:15:41,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:41,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046966047] [2021-11-19 14:15:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:41,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:41,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:41,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56bd2e5e-0753-45d4-a53f-61f0fb1bb439/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:15:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:41,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:15:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:42,272 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 14:15:42,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:42,995 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 14:15:42,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:42,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046966047] [2021-11-19 14:15:42,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046966047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:42,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:42,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 13 [2021-11-19 14:15:42,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99316876] [2021-11-19 14:15:42,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:42,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:42,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:42,998 INFO L87 Difference]: Start difference. First operand 92631 states and 161325 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)