./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:09,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:09,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:09,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:09,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:09,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:09,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:09,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:09,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:09,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:09,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:09,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:09,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:09,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:09,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:09,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:09,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:09,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:09,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:09,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:09,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:09,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:09,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:09,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:09,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:09,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:09,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:09,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:09,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:09,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:09,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:09,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:09,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:09,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:09,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:09,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:09,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:09,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:09,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:09,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:09,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:09,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:14:09,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:09,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:09,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:09,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:09,769 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:09,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:09,769 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:09,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:14:09,778 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:09,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:09,780 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:14:09,781 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:14:09,781 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:09,781 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:14:09,782 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:14:09,782 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:14:09,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:09,783 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:09,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:14:09,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:09,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:09,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:09,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:09,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:09,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:09,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:09,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:09,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:09,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:09,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:09,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:09,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:09,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:09,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:09,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:09,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:14:09,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:14:09,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:09,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:09,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:09,792 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2021-11-19 14:14:10,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:10,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:10,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:10,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:10,171 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:10,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-19 14:14:10,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/217f49282/7e71d10913e846db9b7583747224f885/FLAGd54adb6f6 [2021-11-19 14:14:11,157 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:11,158 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-19 14:14:11,192 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/217f49282/7e71d10913e846db9b7583747224f885/FLAGd54adb6f6 [2021-11-19 14:14:11,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/217f49282/7e71d10913e846db9b7583747224f885 [2021-11-19 14:14:11,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:11,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:11,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:11,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:11,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:11,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:11" (1/1) ... [2021-11-19 14:14:11,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c5dd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:11, skipping insertion in model container [2021-11-19 14:14:11,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:11" (1/1) ... [2021-11-19 14:14:11,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:11,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:12,249 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-19 14:14:12,259 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:12,273 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 14:14:12,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d00ff43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:12, skipping insertion in model container [2021-11-19 14:14:12,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:12,275 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:12,277 INFO L158 Benchmark]: Toolchain (without parser) took 942.90ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 78.1MB in the end (delta: 1.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:12,278 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 89.2MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:12,280 INFO L158 Benchmark]: CACSL2BoogieTranslator took 938.94ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 78.1MB in the end (delta: 1.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:12,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 89.2MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 938.94ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 78.1MB in the end (delta: 1.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 574]: 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:15,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:15,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:15,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:15,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:15,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:15,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:15,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:15,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:15,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:15,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:15,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:15,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:15,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:15,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:15,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:15,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:15,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:15,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:15,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:15,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:15,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:15,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:15,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:15,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:15,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:15,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:15,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:15,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:15,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:15,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:15,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:15,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:15,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:15,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:15,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:15,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:15,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:15,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:15,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:15,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:15,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:15,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:15,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:15,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:15,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:15,527 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:15,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:15,528 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:15,528 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:15,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:15,529 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:15,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:15,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:15,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:15,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:15,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:15,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:15,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:15,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:15,532 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:15,532 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:15,533 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:15,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:15,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:15,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:15,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:15,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:15,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:15,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:15,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:15,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:15,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:15,536 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:15,536 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:15,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:15,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:15,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:15,537 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2021-11-19 14:14:16,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:16,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:16,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:16,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:16,153 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:16,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-19 14:14:16,265 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/85aa3b969/a040e61046d54fa69bbd3c3111e18067/FLAG4999c4821 [2021-11-19 14:14:17,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:17,223 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2021-11-19 14:14:17,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/85aa3b969/a040e61046d54fa69bbd3c3111e18067/FLAG4999c4821 [2021-11-19 14:14:17,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/data/85aa3b969/a040e61046d54fa69bbd3c3111e18067 [2021-11-19 14:14:17,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:17,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:17,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:17,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:17,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:17,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:17" (1/1) ... [2021-11-19 14:14:17,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5affb27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:17, skipping insertion in model container [2021-11-19 14:14:17,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:17" (1/1) ... [2021-11-19 14:14:17,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:17,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:18,203 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-19 14:14:18,208 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:18,226 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:18,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:18,447 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-19 14:14:18,453 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:18,479 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:18,682 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_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2021-11-19 14:14:18,689 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:18,734 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:18,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18 WrapperNode [2021-11-19 14:14:18,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:18,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:18,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:18,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:18,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:18,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:18,919 INFO L137 Inliner]: procedures = 98, calls = 348, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 851 [2021-11-19 14:14:18,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:18,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:18,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:18,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:18,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:18,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:18,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:18,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:19,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:19,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:19,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:19,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:19,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:19,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:19,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:19,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (1/1) ... [2021-11-19 14:14:19,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:19,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:19,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:19,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:19,184 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:14:19,184 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:14:19,185 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:19,185 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:14:19,186 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:14:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:19,186 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:19,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:19,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:14:19,188 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:14:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:14:19,188 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:14:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:19,189 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:19,189 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:19,189 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:19,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:19,189 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:14:19,190 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:14:19,190 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:14:19,190 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:14:19,190 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:14:19,191 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:14:19,191 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:14:19,191 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:14:19,192 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:19,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:19,192 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:19,192 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:19,192 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:14:19,193 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:14:19,193 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:19,193 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:19,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:19,194 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:19,194 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:19,194 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:19,194 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:19,194 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:19,195 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:19,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:19,196 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:19,196 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:19,196 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:19,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:19,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:19,197 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:19,197 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:19,197 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 14:14:19,197 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 14:14:19,393 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:19,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:21,306 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:21,335 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:21,335 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:21,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:21 BoogieIcfgContainer [2021-11-19 14:14:21,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:21,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:21,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:21,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:21,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:17" (1/3) ... [2021-11-19 14:14:21,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b2f104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:21, skipping insertion in model container [2021-11-19 14:14:21,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:18" (2/3) ... [2021-11-19 14:14:21,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b2f104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:21, skipping insertion in model container [2021-11-19 14:14:21,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:21" (3/3) ... [2021-11-19 14:14:21,355 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2021-11-19 14:14:21,363 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:21,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:21,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:21,472 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 14:14:21,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 581 states, 449 states have (on average 1.6614699331848553) internal successors, (746), 467 states have internal predecessors, (746), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:14:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 14:14:21,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:21,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:21,534 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1262274351, now seen corresponding path program 1 times [2021-11-19 14:14:21,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:21,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506398098] [2021-11-19 14:14:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:21,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:21,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:21,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:21,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:22,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:22,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506398098] [2021-11-19 14:14:22,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506398098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:22,746 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:22,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:22,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58906542] [2021-11-19 14:14:22,750 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:22,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:22,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:22,803 INFO L87 Difference]: Start difference. First operand has 581 states, 449 states have (on average 1.6614699331848553) internal successors, (746), 467 states have internal predecessors, (746), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:14:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:23,149 INFO L93 Difference]: Finished difference Result 1157 states and 1906 transitions. [2021-11-19 14:14:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 63 [2021-11-19 14:14:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:23,206 INFO L225 Difference]: With dead ends: 1157 [2021-11-19 14:14:23,208 INFO L226 Difference]: Without dead ends: 576 [2021-11-19 14:14:23,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:23,241 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 16 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4656 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 14:14:23,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 4656 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-19 14:14:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-19 14:14:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 445 states have (on average 1.6404494382022472) internal successors, (730), 462 states have internal predecessors, (730), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:14:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 935 transitions. [2021-11-19 14:14:23,428 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 935 transitions. Word has length 63 [2021-11-19 14:14:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:23,429 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 935 transitions. [2021-11-19 14:14:23,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:14:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 935 transitions. [2021-11-19 14:14:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:14:23,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:23,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:23,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:23,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:23,659 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1711845813, now seen corresponding path program 1 times [2021-11-19 14:14:23,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:23,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067158040] [2021-11-19 14:14:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:23,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:23,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:23,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:23,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:24,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:24,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:24,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067158040] [2021-11-19 14:14:24,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067158040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:24,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:24,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:24,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230009400] [2021-11-19 14:14:24,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:24,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:24,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:24,837 INFO L87 Difference]: Start difference. First operand 576 states and 935 transitions. Second operand has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:25,167 INFO L93 Difference]: Finished difference Result 1140 states and 1862 transitions. [2021-11-19 14:14:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 68 [2021-11-19 14:14:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:25,181 INFO L225 Difference]: With dead ends: 1140 [2021-11-19 14:14:25,181 INFO L226 Difference]: Without dead ends: 585 [2021-11-19 14:14:25,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 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 14:14:25,189 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 118 mSDsluCounter, 5414 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6333 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:25,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6333 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-19 14:14:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2021-11-19 14:14:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 453 states have (on average 1.640176600441501) internal successors, (743), 471 states have internal predecessors, (743), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 99 states have call predecessors, (103), 102 states have call successors, (103) [2021-11-19 14:14:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 949 transitions. [2021-11-19 14:14:25,290 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 949 transitions. Word has length 68 [2021-11-19 14:14:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:25,291 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 949 transitions. [2021-11-19 14:14:25,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 949 transitions. [2021-11-19 14:14:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 14:14:25,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:25,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:25,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:25,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:25,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1898400757, now seen corresponding path program 1 times [2021-11-19 14:14:25,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:25,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936527180] [2021-11-19 14:14:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:25,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:25,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:25,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:25,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:25,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:26,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:26,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:26,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936527180] [2021-11-19 14:14:26,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936527180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:26,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:26,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:26,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339916953] [2021-11-19 14:14:26,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:26,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:26,381 INFO L87 Difference]: Start difference. First operand 585 states and 949 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:26,718 INFO L93 Difference]: Finished difference Result 1196 states and 1953 transitions. [2021-11-19 14:14:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:26,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2021-11-19 14:14:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:26,728 INFO L225 Difference]: With dead ends: 1196 [2021-11-19 14:14:26,729 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:14:26,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 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 14:14:26,735 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 243 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:26,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1770 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:14:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 590. [2021-11-19 14:14:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 458 states have (on average 1.5851528384279476) internal successors, (726), 475 states have internal predecessors, (726), 103 states have call successors, (103), 29 states have call predecessors, (103), 28 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:14:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 931 transitions. [2021-11-19 14:14:26,782 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 931 transitions. Word has length 69 [2021-11-19 14:14:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:26,784 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 931 transitions. [2021-11-19 14:14:26,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 931 transitions. [2021-11-19 14:14:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 14:14:26,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:26,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:26,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:27,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:27,006 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1560263654, now seen corresponding path program 1 times [2021-11-19 14:14:27,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:27,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117026073] [2021-11-19 14:14:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:27,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:27,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:27,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:27,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:27,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:28,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:28,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117026073] [2021-11-19 14:14:28,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117026073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:28,006 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:28,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:14:28,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716813726] [2021-11-19 14:14:28,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:28,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:28,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:28,010 INFO L87 Difference]: Start difference. First operand 590 states and 931 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:28,228 INFO L93 Difference]: Finished difference Result 1138 states and 1816 transitions. [2021-11-19 14:14:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2021-11-19 14:14:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:28,239 INFO L225 Difference]: With dead ends: 1138 [2021-11-19 14:14:28,239 INFO L226 Difference]: Without dead ends: 578 [2021-11-19 14:14:28,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:28,257 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 137 mSDsluCounter, 3557 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4457 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 14:14:28,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4457 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-19 14:14:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 569. [2021-11-19 14:14:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 437 states have (on average 1.597254004576659) internal successors, (698), 454 states have internal predecessors, (698), 103 states have call successors, (103), 29 states have call predecessors, (103), 28 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:14:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 903 transitions. [2021-11-19 14:14:28,314 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 903 transitions. Word has length 71 [2021-11-19 14:14:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:28,314 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 903 transitions. [2021-11-19 14:14:28,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 903 transitions. [2021-11-19 14:14:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 14:14:28,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:28,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:28,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:28,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:28,532 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash 501420920, now seen corresponding path program 1 times [2021-11-19 14:14:28,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:28,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246269564] [2021-11-19 14:14:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:28,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:28,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:28,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:28,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:29,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:29,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246269564] [2021-11-19 14:14:29,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246269564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:29,749 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:29,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:14:29,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784670345] [2021-11-19 14:14:29,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:29,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:14:29,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:14:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:29,751 INFO L87 Difference]: Start difference. First operand 569 states and 903 transitions. Second operand has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:30,203 INFO L93 Difference]: Finished difference Result 1107 states and 1771 transitions. [2021-11-19 14:14:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2021-11-19 14:14:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:30,212 INFO L225 Difference]: With dead ends: 1107 [2021-11-19 14:14:30,213 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:14:30,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 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 14:14:30,232 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 73 mSDsluCounter, 7712 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 8572 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:30,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 8572 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:14:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 571. [2021-11-19 14:14:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 439 states have (on average 1.5922551252847381) internal successors, (699), 456 states have internal predecessors, (699), 103 states have call successors, (103), 29 states have call predecessors, (103), 28 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:14:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 904 transitions. [2021-11-19 14:14:30,271 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 904 transitions. Word has length 74 [2021-11-19 14:14:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:30,272 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 904 transitions. [2021-11-19 14:14:30,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 904 transitions. [2021-11-19 14:14:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 14:14:30,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:30,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:30,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:30,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 911971252, now seen corresponding path program 1 times [2021-11-19 14:14:30,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:30,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720415138] [2021-11-19 14:14:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:30,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:30,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:30,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:14:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:31,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:31,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:31,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720415138] [2021-11-19 14:14:31,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720415138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:31,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:31,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:14:31,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119020645] [2021-11-19 14:14:31,537 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:31,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:31,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:31,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:31,538 INFO L87 Difference]: Start difference. First operand 571 states and 904 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:14:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:33,532 INFO L93 Difference]: Finished difference Result 2127 states and 3450 transitions. [2021-11-19 14:14:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 75 [2021-11-19 14:14:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:33,563 INFO L225 Difference]: With dead ends: 2127 [2021-11-19 14:14:33,564 INFO L226 Difference]: Without dead ends: 1599 [2021-11-19 14:14:33,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:33,572 INFO L933 BasicCegarLoop]: 1147 mSDtfsCounter, 2227 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:33,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 2618 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:14:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-19 14:14:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1473. [2021-11-19 14:14:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1143 states have (on average 1.6176727909011372) internal successors, (1849), 1177 states have internal predecessors, (1849), 259 states have call successors, (259), 73 states have call predecessors, (259), 70 states have return successors, (272), 238 states have call predecessors, (272), 256 states have call successors, (272) [2021-11-19 14:14:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2380 transitions. [2021-11-19 14:14:33,747 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2380 transitions. Word has length 75 [2021-11-19 14:14:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:33,748 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2380 transitions. [2021-11-19 14:14:33,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:14:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2380 transitions. [2021-11-19 14:14:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:14:33,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:33,759 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:33,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:33,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:33,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1486684888, now seen corresponding path program 1 times [2021-11-19 14:14:33,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:33,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628045240] [2021-11-19 14:14:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:33,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:33,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:33,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:34,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:14:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:14:34,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:14:35,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:35,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628045240] [2021-11-19 14:14:35,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628045240] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:35,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:35,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-19 14:14:35,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602578805] [2021-11-19 14:14:35,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:35,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:35,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:35,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:35,282 INFO L87 Difference]: Start difference. First operand 1473 states and 2380 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:14:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:36,275 INFO L93 Difference]: Finished difference Result 3102 states and 4982 transitions. [2021-11-19 14:14:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-19 14:14:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:36,298 INFO L225 Difference]: With dead ends: 3102 [2021-11-19 14:14:36,298 INFO L226 Difference]: Without dead ends: 1672 [2021-11-19 14:14:36,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:36,313 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 628 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 3941 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:36,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 3941 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:14:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-19 14:14:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1666. [2021-11-19 14:14:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1278 states have (on average 1.5524256651017214) internal successors, (1984), 1304 states have internal predecessors, (1984), 295 states have call successors, (295), 91 states have call predecessors, (295), 92 states have return successors, (340), 282 states have call predecessors, (340), 290 states have call successors, (340) [2021-11-19 14:14:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2619 transitions. [2021-11-19 14:14:36,464 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2619 transitions. Word has length 129 [2021-11-19 14:14:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:36,467 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 2619 transitions. [2021-11-19 14:14:36,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:14:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2619 transitions. [2021-11-19 14:14:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:14:36,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:36,475 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:36,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:36,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:36,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1214675461, now seen corresponding path program 1 times [2021-11-19 14:14:36,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:36,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048499395] [2021-11-19 14:14:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:36,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:36,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:36,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:14:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:37,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:14:37,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:14:38,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:38,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048499395] [2021-11-19 14:14:38,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048499395] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:38,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:38,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:38,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791001790] [2021-11-19 14:14:38,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:38,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:38,118 INFO L87 Difference]: Start difference. First operand 1666 states and 2619 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:39,508 INFO L93 Difference]: Finished difference Result 3309 states and 5361 transitions. [2021-11-19 14:14:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:39,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2021-11-19 14:14:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:39,527 INFO L225 Difference]: With dead ends: 3309 [2021-11-19 14:14:39,528 INFO L226 Difference]: Without dead ends: 1686 [2021-11-19 14:14:39,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 251 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 14:14:39,546 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 812 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:39,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 2175 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:14:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-11-19 14:14:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1686. [2021-11-19 14:14:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1293 states have (on average 1.546017014694509) internal successors, (1999), 1319 states have internal predecessors, (1999), 295 states have call successors, (295), 96 states have call predecessors, (295), 97 states have return successors, (344), 282 states have call predecessors, (344), 290 states have call successors, (344) [2021-11-19 14:14:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2638 transitions. [2021-11-19 14:14:39,687 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2638 transitions. Word has length 130 [2021-11-19 14:14:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2638 transitions. [2021-11-19 14:14:39,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2638 transitions. [2021-11-19 14:14:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:14:39,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:39,696 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:39,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:39,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:39,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1301133774, now seen corresponding path program 1 times [2021-11-19 14:14:39,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:39,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538030344] [2021-11-19 14:14:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:39,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:39,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:39,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:39,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:14:40,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:41,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:41,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538030344] [2021-11-19 14:14:41,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538030344] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:41,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:41,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:41,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873394144] [2021-11-19 14:14:41,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:41,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:41,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:41,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:41,283 INFO L87 Difference]: Start difference. First operand 1686 states and 2638 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:42,484 INFO L93 Difference]: Finished difference Result 3354 states and 5400 transitions. [2021-11-19 14:14:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-19 14:14:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:42,507 INFO L225 Difference]: With dead ends: 3354 [2021-11-19 14:14:42,508 INFO L226 Difference]: Without dead ends: 1711 [2021-11-19 14:14:42,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 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 14:14:42,532 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 812 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:42,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2176 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-11-19 14:14:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1711. [2021-11-19 14:14:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1313 states have (on average 1.5376999238385376) internal successors, (2019), 1339 states have internal predecessors, (2019), 295 states have call successors, (295), 101 states have call predecessors, (295), 102 states have return successors, (348), 282 states have call predecessors, (348), 290 states have call successors, (348) [2021-11-19 14:14:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2662 transitions. [2021-11-19 14:14:42,701 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2662 transitions. Word has length 133 [2021-11-19 14:14:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:42,702 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2662 transitions. [2021-11-19 14:14:42,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2662 transitions. [2021-11-19 14:14:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:14:42,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:42,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:42,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:42,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:42,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1185865247, now seen corresponding path program 1 times [2021-11-19 14:14:42,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:42,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73989331] [2021-11-19 14:14:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:42,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:42,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:42,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:42,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:14:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:14:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:44,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:44,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73989331] [2021-11-19 14:14:44,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73989331] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:44,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:44,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:44,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341261366] [2021-11-19 14:14:44,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:44,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:44,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:44,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:44,173 INFO L87 Difference]: Start difference. First operand 1711 states and 2662 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:45,370 INFO L93 Difference]: Finished difference Result 3409 states and 5449 transitions. [2021-11-19 14:14:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-11-19 14:14:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:45,390 INFO L225 Difference]: With dead ends: 3409 [2021-11-19 14:14:45,391 INFO L226 Difference]: Without dead ends: 1741 [2021-11-19 14:14:45,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 263 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 14:14:45,409 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 813 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:45,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 2176 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:14:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-11-19 14:14:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1741. [2021-11-19 14:14:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1338 states have (on average 1.5276532137518684) internal successors, (2044), 1364 states have internal predecessors, (2044), 295 states have call successors, (295), 106 states have call predecessors, (295), 107 states have return successors, (352), 282 states have call predecessors, (352), 290 states have call successors, (352) [2021-11-19 14:14:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2691 transitions. [2021-11-19 14:14:45,520 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2691 transitions. Word has length 136 [2021-11-19 14:14:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:45,521 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 2691 transitions. [2021-11-19 14:14:45,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2691 transitions. [2021-11-19 14:14:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:14:45,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:45,530 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:45,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:45,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash 338876642, now seen corresponding path program 1 times [2021-11-19 14:14:45,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:45,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748280416] [2021-11-19 14:14:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:45,754 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:14:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:14:46,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:14:47,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:47,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748280416] [2021-11-19 14:14:47,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748280416] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:47,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:47,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:14:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065091170] [2021-11-19 14:14:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:47,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:47,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:47,069 INFO L87 Difference]: Start difference. First operand 1741 states and 2691 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:48,175 INFO L93 Difference]: Finished difference Result 3474 states and 5508 transitions. [2021-11-19 14:14:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2021-11-19 14:14:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:48,198 INFO L225 Difference]: With dead ends: 3474 [2021-11-19 14:14:48,199 INFO L226 Difference]: Without dead ends: 1776 [2021-11-19 14:14:48,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 269 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 14:14:48,217 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 814 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:48,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 2176 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-11-19 14:14:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1776. [2021-11-19 14:14:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1368 states have (on average 1.5160818713450293) internal successors, (2074), 1394 states have internal predecessors, (2074), 295 states have call successors, (295), 111 states have call predecessors, (295), 112 states have return successors, (356), 282 states have call predecessors, (356), 290 states have call successors, (356) [2021-11-19 14:14:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2725 transitions. [2021-11-19 14:14:48,370 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2725 transitions. Word has length 139 [2021-11-19 14:14:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:48,371 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2725 transitions. [2021-11-19 14:14:48,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2725 transitions. [2021-11-19 14:14:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:14:48,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:48,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:48,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:48,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:48,601 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1657557949, now seen corresponding path program 1 times [2021-11-19 14:14:48,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:48,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126712855] [2021-11-19 14:14:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:48,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:48,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:48,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:48,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:14:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:49,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:14:50,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:50,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126712855] [2021-11-19 14:14:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126712855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:50,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800809840] [2021-11-19 14:14:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:50,260 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:50,262 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:50,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:14:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:51,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:14:51,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800809840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:51,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130495233] [2021-11-19 14:14:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:51,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:51,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:51,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:14:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:51,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:14:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:14:52,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:14:53,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130495233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:53,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:14:53,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:14:53,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253442747] [2021-11-19 14:14:53,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:53,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:14:53,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:14:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:14:53,114 INFO L87 Difference]: Start difference. First operand 1776 states and 2725 transitions. Second operand has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 14 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 12 states have return successors, (33), 12 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-19 14:15:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:06,567 INFO L93 Difference]: Finished difference Result 5934 states and 9426 transitions. [2021-11-19 14:15:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:15:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 14 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 12 states have return successors, (33), 12 states have call predecessors, (33), 8 states have call successors, (33) Word has length 142 [2021-11-19 14:15:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:06,624 INFO L225 Difference]: With dead ends: 5934 [2021-11-19 14:15:06,624 INFO L226 Difference]: Without dead ends: 4201 [2021-11-19 14:15:06,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-19 14:15:06,646 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 7513 mSDsluCounter, 3857 mSDsCounter, 0 mSdLazyCounter, 8491 mSolverCounterSat, 3094 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7598 SdHoareTripleChecker+Valid, 5546 SdHoareTripleChecker+Invalid, 11585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3094 IncrementalHoareTripleChecker+Valid, 8491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:06,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7598 Valid, 5546 Invalid, 11585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3094 Valid, 8491 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2021-11-19 14:15:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-11-19 14:15:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3727. [2021-11-19 14:15:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2832 states have (on average 1.5070621468926553) internal successors, (4268), 2897 states have internal predecessors, (4268), 638 states have call successors, (638), 219 states have call predecessors, (638), 256 states have return successors, (876), 639 states have call predecessors, (876), 628 states have call successors, (876) [2021-11-19 14:15:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5782 transitions. [2021-11-19 14:15:07,044 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5782 transitions. Word has length 142 [2021-11-19 14:15:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5782 transitions. [2021-11-19 14:15:07,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 14 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 12 states have return successors, (33), 12 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-19 14:15:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5782 transitions. [2021-11-19 14:15:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:15:07,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:07,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:07,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:07,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:07,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 14:15:07,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:07,668 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1393812146, now seen corresponding path program 1 times [2021-11-19 14:15:07,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:07,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814276675] [2021-11-19 14:15:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:07,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:07,673 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:07,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:15:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:08,402 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 14:15:08,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:08,986 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 14:15:08,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:08,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814276675] [2021-11-19 14:15:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814276675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:08,987 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:15:08,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787009374] [2021-11-19 14:15:08,987 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:15:08,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:15:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:08,989 INFO L87 Difference]: Start difference. First operand 3727 states and 5782 transitions. Second operand has 10 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:15:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:09,586 INFO L93 Difference]: Finished difference Result 7263 states and 11292 transitions. [2021-11-19 14:15:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 145 [2021-11-19 14:15:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:09,661 INFO L225 Difference]: With dead ends: 7263 [2021-11-19 14:15:09,662 INFO L226 Difference]: Without dead ends: 3569 [2021-11-19 14:15:09,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 280 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 14:15:09,686 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 69 mSDsluCounter, 5977 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6837 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:09,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 6837 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:15:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-11-19 14:15:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3554. [2021-11-19 14:15:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 2700 states have (on average 1.5137037037037038) internal successors, (4087), 2764 states have internal predecessors, (4087), 614 states have call successors, (614), 204 states have call predecessors, (614), 239 states have return successors, (814), 614 states have call predecessors, (814), 604 states have call successors, (814) [2021-11-19 14:15:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5515 transitions. [2021-11-19 14:15:09,975 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5515 transitions. Word has length 145 [2021-11-19 14:15:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:09,976 INFO L470 AbstractCegarLoop]: Abstraction has 3554 states and 5515 transitions. [2021-11-19 14:15:09,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:15:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5515 transitions. [2021-11-19 14:15:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:15:09,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:09,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:10,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:10,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:10,203 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash -720807921, now seen corresponding path program 1 times [2021-11-19 14:15:10,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:10,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624900631] [2021-11-19 14:15:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:10,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:10,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:10,206 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:10,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:15:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:11,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:15:12,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:12,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624900631] [2021-11-19 14:15:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624900631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:12,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744677062] [2021-11-19 14:15:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:12,158 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:12,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:12,159 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:15:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:12,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:15:13,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744677062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:13,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525611240] [2021-11-19 14:15:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:13,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:13,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:13,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:13,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 14:15:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:14,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:15:15,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525611240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:15,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:15,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:15:15,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536656744] [2021-11-19 14:15:15,349 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:15,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:15:15,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:15:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:15:15,352 INFO L87 Difference]: Start difference. First operand 3554 states and 5515 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (33), 6 states have call predecessors, (33), 10 states have return successors, (33), 10 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-19 14:15:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:23,940 INFO L93 Difference]: Finished difference Result 9045 states and 14313 transitions. [2021-11-19 14:15:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:15:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (33), 6 states have call predecessors, (33), 10 states have return successors, (33), 10 states have call predecessors, (33), 8 states have call successors, (33) Word has length 150 [2021-11-19 14:15:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:24,003 INFO L225 Difference]: With dead ends: 9045 [2021-11-19 14:15:24,003 INFO L226 Difference]: Without dead ends: 5531 [2021-11-19 14:15:24,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:15:24,032 INFO L933 BasicCegarLoop]: 1614 mSDtfsCounter, 5948 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 5371 mSolverCounterSat, 1917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6025 SdHoareTripleChecker+Valid, 3992 SdHoareTripleChecker+Invalid, 7288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1917 IncrementalHoareTripleChecker+Valid, 5371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:24,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6025 Valid, 3992 Invalid, 7288 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1917 Valid, 5371 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-19 14:15:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-11-19 14:15:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 5324. [2021-11-19 14:15:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5324 states, 4028 states have (on average 1.513157894736842) internal successors, (6095), 4122 states have internal predecessors, (6095), 933 states have call successors, (933), 297 states have call predecessors, (933), 362 states have return successors, (1258), 950 states have call predecessors, (1258), 918 states have call successors, (1258) [2021-11-19 14:15:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 8286 transitions. [2021-11-19 14:15:24,495 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 8286 transitions. Word has length 150 [2021-11-19 14:15:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:24,496 INFO L470 AbstractCegarLoop]: Abstraction has 5324 states and 8286 transitions. [2021-11-19 14:15:24,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (33), 6 states have call predecessors, (33), 10 states have return successors, (33), 10 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-19 14:15:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 8286 transitions. [2021-11-19 14:15:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:15:24,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:24,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:24,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:24,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:24,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-19 14:15:25,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:25,138 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1008150526, now seen corresponding path program 1 times [2021-11-19 14:15:25,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:25,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553877788] [2021-11-19 14:15:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:25,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:25,140 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:25,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:15:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 14:15:26,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:26,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553877788] [2021-11-19 14:15:26,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553877788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:26,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1246619459] [2021-11-19 14:15:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:26,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:26,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:26,533 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:26,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:15:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:26,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:27,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 14:15:27,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1246619459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:27,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923262453] [2021-11-19 14:15:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:27,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:27,639 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:27,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 14:15:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:28,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 14:15:28,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923262453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:28,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:15:28,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461951016] [2021-11-19 14:15:28,670 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:28,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:15:28,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:15:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:28,672 INFO L87 Difference]: Start difference. First operand 5324 states and 8286 transitions. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 14:15:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:37,584 INFO L93 Difference]: Finished difference Result 21303 states and 34295 transitions. [2021-11-19 14:15:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:15:37,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) Word has length 151 [2021-11-19 14:15:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:37,772 INFO L225 Difference]: With dead ends: 21303 [2021-11-19 14:15:37,773 INFO L226 Difference]: Without dead ends: 16007 [2021-11-19 14:15:37,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 900 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:15:37,829 INFO L933 BasicCegarLoop]: 1437 mSDtfsCounter, 5016 mSDsluCounter, 2115 mSDsCounter, 0 mSdLazyCounter, 6422 mSolverCounterSat, 1609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5120 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 8031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1609 IncrementalHoareTripleChecker+Valid, 6422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5120 Valid, 3552 Invalid, 8031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1609 Valid, 6422 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-19 14:15:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16007 states. [2021-11-19 14:15:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16007 to 14425. [2021-11-19 14:15:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14425 states, 10890 states have (on average 1.502020202020202) internal successors, (16357), 11155 states have internal predecessors, (16357), 2528 states have call successors, (2528), 864 states have call predecessors, (2528), 1006 states have return successors, (3638), 2543 states have call predecessors, (3638), 2492 states have call successors, (3638) [2021-11-19 14:15:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14425 states to 14425 states and 22523 transitions. [2021-11-19 14:15:38,930 INFO L78 Accepts]: Start accepts. Automaton has 14425 states and 22523 transitions. Word has length 151 [2021-11-19 14:15:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:38,931 INFO L470 AbstractCegarLoop]: Abstraction has 14425 states and 22523 transitions. [2021-11-19 14:15:38,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 14:15:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14425 states and 22523 transitions. [2021-11-19 14:15:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:15:38,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:38,937 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:38,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 14:15:39,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:39,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:15:39,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:39,556 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash 228765637, now seen corresponding path program 1 times [2021-11-19 14:15:39,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:39,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442392250] [2021-11-19 14:15:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:39,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:39,559 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:39,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:15:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:15:42,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:45,695 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 14:15:45,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:45,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442392250] [2021-11-19 14:15:45,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442392250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:45,695 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:45,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-19 14:15:45,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700332045] [2021-11-19 14:15:45,696 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:45,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:45,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:45,697 INFO L87 Difference]: Start difference. First operand 14425 states and 22523 transitions. Second operand has 13 states, 13 states have (on average 14.692307692307692) internal successors, (191), 13 states have internal predecessors, (191), 11 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-19 14:16:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:00,788 INFO L93 Difference]: Finished difference Result 43852 states and 70729 transitions. [2021-11-19 14:16:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:16:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.692307692307692) internal successors, (191), 13 states have internal predecessors, (191), 11 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 153 [2021-11-19 14:16:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:01,183 INFO L225 Difference]: With dead ends: 43852 [2021-11-19 14:16:01,183 INFO L226 Difference]: Without dead ends: 29443 [2021-11-19 14:16:01,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:16:01,331 INFO L933 BasicCegarLoop]: 1613 mSDtfsCounter, 7299 mSDsluCounter, 3274 mSDsCounter, 0 mSdLazyCounter, 9677 mSolverCounterSat, 2153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7502 SdHoareTripleChecker+Valid, 4887 SdHoareTripleChecker+Invalid, 11830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2153 IncrementalHoareTripleChecker+Valid, 9677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:01,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7502 Valid, 4887 Invalid, 11830 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2153 Valid, 9677 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2021-11-19 14:16:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29443 states. [2021-11-19 14:16:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29443 to 24937. [2021-11-19 14:16:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24937 states, 18485 states have (on average 1.4806599945902084) internal successors, (27370), 18991 states have internal predecessors, (27370), 4726 states have call successors, (4726), 1499 states have call predecessors, (4726), 1725 states have return successors, (6791), 4704 states have call predecessors, (6791), 4672 states have call successors, (6791) [2021-11-19 14:16:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24937 states to 24937 states and 38887 transitions. [2021-11-19 14:16:03,538 INFO L78 Accepts]: Start accepts. Automaton has 24937 states and 38887 transitions. Word has length 153 [2021-11-19 14:16:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:03,539 INFO L470 AbstractCegarLoop]: Abstraction has 24937 states and 38887 transitions. [2021-11-19 14:16:03,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.692307692307692) internal successors, (191), 13 states have internal predecessors, (191), 11 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-19 14:16:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24937 states and 38887 transitions. [2021-11-19 14:16:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:16:03,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:03,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:03,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:03,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:03,772 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2125578942, now seen corresponding path program 1 times [2021-11-19 14:16:03,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:03,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692514197] [2021-11-19 14:16:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:03,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:03,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:03,776 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:16:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:16:04,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 14:16:05,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:05,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692514197] [2021-11-19 14:16:05,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692514197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:05,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:05,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:16:05,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050510679] [2021-11-19 14:16:05,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:05,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:16:05,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:16:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:05,281 INFO L87 Difference]: Start difference. First operand 24937 states and 38887 transitions. Second operand has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-19 14:16:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:19,046 INFO L93 Difference]: Finished difference Result 82306 states and 137314 transitions. [2021-11-19 14:16:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:16:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) Word has length 157 [2021-11-19 14:16:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:19,896 INFO L225 Difference]: With dead ends: 82306 [2021-11-19 14:16:19,896 INFO L226 Difference]: Without dead ends: 57193 [2021-11-19 14:16:20,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:16:20,238 INFO L933 BasicCegarLoop]: 1752 mSDtfsCounter, 6078 mSDsluCounter, 2656 mSDsCounter, 0 mSdLazyCounter, 7806 mSolverCounterSat, 2272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6187 SdHoareTripleChecker+Valid, 4408 SdHoareTripleChecker+Invalid, 10078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2272 IncrementalHoareTripleChecker+Valid, 7806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:20,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6187 Valid, 4408 Invalid, 10078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2272 Valid, 7806 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-11-19 14:16:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57193 states. [2021-11-19 14:16:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57193 to 49102. [2021-11-19 14:16:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49102 states, 34992 states have (on average 1.463991769547325) internal successors, (51228), 36470 states have internal predecessors, (51228), 10834 states have call successors, (10834), 2494 states have call predecessors, (10834), 3275 states have return successors, (16642), 11061 states have call predecessors, (16642), 10741 states have call successors, (16642) [2021-11-19 14:16:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49102 states to 49102 states and 78704 transitions. [2021-11-19 14:16:26,182 INFO L78 Accepts]: Start accepts. Automaton has 49102 states and 78704 transitions. Word has length 157 [2021-11-19 14:16:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 49102 states and 78704 transitions. [2021-11-19 14:16:26,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-19 14:16:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 49102 states and 78704 transitions. [2021-11-19 14:16:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:16:26,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:26,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:26,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:26,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:26,408 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -391474492, now seen corresponding path program 1 times [2021-11-19 14:16:26,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:26,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549490942] [2021-11-19 14:16:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:26,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:26,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:26,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:26,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:16:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:16:26,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:16:27,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:16:28,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:28,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549490942] [2021-11-19 14:16:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549490942] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:28,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:28,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-19 14:16:28,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654578487] [2021-11-19 14:16:28,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:28,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:16:28,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:16:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:16:28,328 INFO L87 Difference]: Start difference. First operand 49102 states and 78704 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-19 14:16:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:40,510 INFO L93 Difference]: Finished difference Result 87519 states and 141058 transitions. [2021-11-19 14:16:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:16:40,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 157 [2021-11-19 14:16:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:40,966 INFO L225 Difference]: With dead ends: 87519 [2021-11-19 14:16:40,966 INFO L226 Difference]: Without dead ends: 50186 [2021-11-19 14:16:41,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:16:41,407 INFO L933 BasicCegarLoop]: 1497 mSDtfsCounter, 2689 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 7674 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2808 SdHoareTripleChecker+Valid, 4633 SdHoareTripleChecker+Invalid, 8417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 7674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:41,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2808 Valid, 4633 Invalid, 8417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 7674 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-19 14:16:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50186 states. [2021-11-19 14:16:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50186 to 49145. [2021-11-19 14:16:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49145 states, 35033 states have (on average 1.4625924128678673) internal successors, (51239), 36511 states have internal predecessors, (51239), 10818 states have call successors, (10818), 2484 states have call predecessors, (10818), 3293 states have return successors, (16675), 11073 states have call predecessors, (16675), 10725 states have call successors, (16675) [2021-11-19 14:16:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49145 states to 49145 states and 78732 transitions. [2021-11-19 14:16:46,067 INFO L78 Accepts]: Start accepts. Automaton has 49145 states and 78732 transitions. Word has length 157 [2021-11-19 14:16:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:46,068 INFO L470 AbstractCegarLoop]: Abstraction has 49145 states and 78732 transitions. [2021-11-19 14:16:46,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 6 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-19 14:16:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 49145 states and 78732 transitions. [2021-11-19 14:16:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:16:46,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:46,075 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, 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 14:16:46,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:46,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,296 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2066128348, now seen corresponding path program 1 times [2021-11-19 14:16:46,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:46,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171513964] [2021-11-19 14:16:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:46,299 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed60a80-4e5b-4e77-95f3-86c00bdc4fc1/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:16:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:46,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:16:46,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:16:47,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:47,534 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 14:16:47,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:47,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171513964] [2021-11-19 14:16:47,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171513964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:47,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:47,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:16:47,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355080862] [2021-11-19 14:16:47,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:47,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:47,538 INFO L87 Difference]: Start difference. First operand 49145 states and 78732 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 14:17:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:05,273 INFO L93 Difference]: Finished difference Result 178132 states and 306096 transitions. [2021-11-19 14:17:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:05,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 164 [2021-11-19 14:17:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:06,454 INFO L225 Difference]: With dead ends: 178132 [2021-11-19 14:17:06,454 INFO L226 Difference]: Without dead ends: 129430 [2021-11-19 14:17:07,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:07,352 INFO L933 BasicCegarLoop]: 1756 mSDtfsCounter, 3669 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3779 SdHoareTripleChecker+Valid, 2935 SdHoareTripleChecker+Invalid, 4333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:07,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3779 Valid, 2935 Invalid, 4333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 14:17:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129430 states.