./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF --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 b02d53de4cc8dbaebc187e8fa236234211af4eca5416c7869304d04f0d61a0bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:51,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:51,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:51,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:51,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:51,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:51,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:51,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:51,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:51,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:51,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:51,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:51,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:51,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:51,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:51,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:51,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:51,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:51,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:51,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:51,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:51,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:51,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:51,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:51,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:51,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:51,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:51,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:51,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:51,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:51,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:51,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:51,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:51,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:51,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:51,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:51,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:51,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:51,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:51,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:51,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:51,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:38:51,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:51,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:51,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:51,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:51,868 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:51,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:51,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:51,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:38:51,875 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:51,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:51,877 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:38:51,877 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:38:51,877 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:51,877 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:38:51,878 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:38:51,878 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:38:51,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:51,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:38:51,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:38:51,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:38:51,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:51,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:51,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:51,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:51,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:51,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:38:51,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:51,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:51,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:51,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:51,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:51,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:51,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:51,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:51,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:51,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:38:51,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:38:51,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:51,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:51,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:51,886 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_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b02d53de4cc8dbaebc187e8fa236234211af4eca5416c7869304d04f0d61a0bd [2021-11-12 22:38:52,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:52,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:52,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:52,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:52,246 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:52,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2021-11-12 22:38:52,310 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/982ff5007/042de468f0104743a0c79ed342e1895a/FLAG6da0205b7 [2021-11-12 22:38:53,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:53,054 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2021-11-12 22:38:53,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/982ff5007/042de468f0104743a0c79ed342e1895a/FLAG6da0205b7 [2021-11-12 22:38:53,211 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/982ff5007/042de468f0104743a0c79ed342e1895a [2021-11-12 22:38:53,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:53,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:53,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:53,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:53,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:53,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:53" (1/1) ... [2021-11-12 22:38:53,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ecc057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:53, skipping insertion in model container [2021-11-12 22:38:53,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:53" (1/1) ... [2021-11-12 22:38:53,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:53,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:53,733 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2021-11-12 22:38:53,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:53,864 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) [2021-11-12 22:38:53,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@734cccdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:53, skipping insertion in model container [2021-11-12 22:38:53,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:53,868 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:38:53,870 INFO L158 Benchmark]: Toolchain (without parser) took 653.26ms. Allocated memory is still 119.5MB. Free memory was 80.3MB in the beginning and 82.2MB in the end (delta: -2.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:38:53,871 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 119.5MB. Free memory is still 99.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:38:53,873 INFO L158 Benchmark]: CACSL2BoogieTranslator took 649.99ms. Allocated memory is still 119.5MB. Free memory was 80.1MB in the beginning and 82.2MB in the end (delta: -2.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:38:53,877 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 119.5MB. Free memory is still 99.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 649.99ms. Allocated memory is still 119.5MB. Free memory was 80.1MB in the beginning and 82.2MB in the end (delta: -2.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF --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 b02d53de4cc8dbaebc187e8fa236234211af4eca5416c7869304d04f0d61a0bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:56,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:56,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:56,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:56,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:56,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:56,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:56,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:56,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:56,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:56,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:56,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:56,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:56,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:56,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:56,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:56,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:56,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:56,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:56,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:56,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:56,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:56,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:56,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:56,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:56,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:56,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:56,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:56,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:56,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:56,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:56,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:56,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:56,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:56,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:56,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:56,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:56,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:56,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:56,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:56,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:56,449 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:38:56,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:56,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:56,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:56,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:56,496 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:56,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:56,497 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:56,497 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:56,497 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:56,497 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:56,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:56,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:38:56,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:38:56,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:56,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:56,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:56,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:56,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:56,502 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:38:56,502 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:38:56,502 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:38:56,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:56,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:56,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:56,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:56,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:38:56,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:56,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:56,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:56,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:56,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:56,505 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:38:56,505 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:38:56,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:56,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:56,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:56,506 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_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b02d53de4cc8dbaebc187e8fa236234211af4eca5416c7869304d04f0d61a0bd [2021-11-12 22:38:56,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:56,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:56,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:56,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:56,978 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:56,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2021-11-12 22:38:57,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/0b2540a5b/d1a2a71536a44c7fa220b4dcdf054066/FLAG0f8952812 [2021-11-12 22:38:57,940 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:57,940 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2021-11-12 22:38:57,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/0b2540a5b/d1a2a71536a44c7fa220b4dcdf054066/FLAG0f8952812 [2021-11-12 22:38:58,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/data/0b2540a5b/d1a2a71536a44c7fa220b4dcdf054066 [2021-11-12 22:38:58,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:58,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:58,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:58,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:58,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:58,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:58" (1/1) ... [2021-11-12 22:38:58,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10252f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:58, skipping insertion in model container [2021-11-12 22:38:58,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:58" (1/1) ... [2021-11-12 22:38:58,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:58,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:58,787 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2021-11-12 22:38:58,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:58,933 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:38:58,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:59,041 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2021-11-12 22:38:59,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:59,147 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:38:59,218 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2021-11-12 22:38:59,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:59,280 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:38:59,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59 WrapperNode [2021-11-12 22:38:59,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:59,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:59,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:38:59,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:38:59,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:59,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:38:59,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:38:59,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:38:59,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:38:59,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:38:59,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:38:59,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:38:59,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (1/1) ... [2021-11-12 22:38:59,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:59,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:59,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:38:59,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:38:59,617 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:38:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:38:59,618 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:38:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:38:59,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:38:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:38:59,619 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:38:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:38:59,619 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:38:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:38:59,620 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:38:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:38:59,620 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:38:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:38:59,620 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:38:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:38:59,621 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:38:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:38:59,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:38:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:38:59,621 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:38:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:38:59,621 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:38:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:38:59,621 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:38:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:38:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:38:59,622 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:38:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:38:59,622 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:38:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:38:59,623 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:38:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:38:59,623 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:38:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:38:59,623 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:38:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:38:59,624 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:38:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:38:59,624 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:38:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:38:59,625 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:38:59,625 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:38:59,625 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:38:59,625 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:38:59,625 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:38:59,625 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 22:38:59,626 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 22:38:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:38:59,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:38:59,626 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:38:59,626 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:39:03,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:39:03,837 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:39:03,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:39:03 BoogieIcfgContainer [2021-11-12 22:39:03,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:39:03,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:39:03,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:39:03,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:39:03,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:38:58" (1/3) ... [2021-11-12 22:39:03,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604df67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:39:03, skipping insertion in model container [2021-11-12 22:39:03,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:59" (2/3) ... [2021-11-12 22:39:03,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604df67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:39:03, skipping insertion in model container [2021-11-12 22:39:03,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:39:03" (3/3) ... [2021-11-12 22:39:03,855 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product21.cil.c [2021-11-12 22:39:03,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:39:03,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:39:03,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:39:03,939 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 [2021-11-12 22:39:03,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:39:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 563 states, 442 states have (on average 1.6945701357466063) internal successors, (749), 463 states have internal predecessors, (749), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:39:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:39:04,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:04,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:04,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1455804326, now seen corresponding path program 1 times [2021-11-12 22:39:04,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:04,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656066571] [2021-11-12 22:39:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:04,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:04,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:04,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:39:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:04,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:39:04,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:05,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:05,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:05,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656066571] [2021-11-12 22:39:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656066571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:05,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:05,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:39:05,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038467023] [2021-11-12 22:39:05,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:39:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:39:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:39:05,269 INFO L87 Difference]: Start difference. First operand has 563 states, 442 states have (on average 1.6945701357466063) internal successors, (749), 463 states have internal predecessors, (749), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:39:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:05,350 INFO L93 Difference]: Finished difference Result 584 states and 969 transitions. [2021-11-12 22:39:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:39:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 88 [2021-11-12 22:39:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:05,404 INFO L225 Difference]: With dead ends: 584 [2021-11-12 22:39:05,405 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 22:39:05,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:39:05,427 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:05,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 7.92ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:39:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 22:39:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-12 22:39:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6926605504587156) internal successors, (738), 455 states have internal predecessors, (738), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:39:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 923 transitions. [2021-11-12 22:39:05,642 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 923 transitions. Word has length 88 [2021-11-12 22:39:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:05,645 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 923 transitions. [2021-11-12 22:39:05,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:39:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 923 transitions. [2021-11-12 22:39:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:39:05,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:05,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:05,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:05,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:05,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -704471846, now seen corresponding path program 1 times [2021-11-12 22:39:05,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:05,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109481449] [2021-11-12 22:39:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:05,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:05,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:05,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:05,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:39:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:39:06,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:06,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:07,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:07,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109481449] [2021-11-12 22:39:07,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109481449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:07,108 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:07,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:39:07,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403354157] [2021-11-12 22:39:07,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:07,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:39:07,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:39:07,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:39:07,112 INFO L87 Difference]: Start difference. First operand 555 states and 923 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:39:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:07,280 INFO L93 Difference]: Finished difference Result 1094 states and 1824 transitions. [2021-11-12 22:39:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 90 [2021-11-12 22:39:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:07,288 INFO L225 Difference]: With dead ends: 1094 [2021-11-12 22:39:07,288 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 22:39:07,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:39:07,296 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 15 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3633 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.76ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:07,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3633 Invalid, 36 Unknown, 0 Unchecked, 21.76ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 52.66ms Time] [2021-11-12 22:39:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 22:39:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-12 22:39:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6788990825688073) internal successors, (732), 455 states have internal predecessors, (732), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:39:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 917 transitions. [2021-11-12 22:39:07,353 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 917 transitions. Word has length 90 [2021-11-12 22:39:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:07,356 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 917 transitions. [2021-11-12 22:39:07,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:39:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 917 transitions. [2021-11-12 22:39:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 22:39:07,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:07,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:07,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:07,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:07,591 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:07,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:07,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2013870685, now seen corresponding path program 1 times [2021-11-12 22:39:07,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:07,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459211963] [2021-11-12 22:39:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:07,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:07,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:07,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:39:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:39:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:08,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:09,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:09,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459211963] [2021-11-12 22:39:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459211963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:09,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:09,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:39:09,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363686984] [2021-11-12 22:39:09,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:09,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:39:09,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:39:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:39:09,058 INFO L87 Difference]: Start difference. First operand 555 states and 917 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:39:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:09,308 INFO L93 Difference]: Finished difference Result 1052 states and 1741 transitions. [2021-11-12 22:39:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:39:09,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 95 [2021-11-12 22:39:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:09,317 INFO L225 Difference]: With dead ends: 1052 [2021-11-12 22:39:09,317 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 22:39:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:39:09,322 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 118 mSDsluCounter, 6232 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 7136 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.19ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:09,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 7136 Invalid, 95 Unknown, 0 Unchecked, 20.19ms Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 139.70ms Time] [2021-11-12 22:39:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 22:39:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 22:39:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 430 states have (on average 1.672093023255814) internal successors, (719), 449 states have internal predecessors, (719), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:39:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 904 transitions. [2021-11-12 22:39:09,357 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 904 transitions. Word has length 95 [2021-11-12 22:39:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:09,358 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 904 transitions. [2021-11-12 22:39:09,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:39:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 904 transitions. [2021-11-12 22:39:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:39:09,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:09,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:09,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:09,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:09,586 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:09,595 INFO L85 PathProgramCache]: Analyzing trace with hash -921091645, now seen corresponding path program 1 times [2021-11-12 22:39:09,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:09,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629021322] [2021-11-12 22:39:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:09,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:09,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:09,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:39:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:10,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:39:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:10,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:10,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:10,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629021322] [2021-11-12 22:39:10,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629021322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:10,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:10,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:39:10,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895925940] [2021-11-12 22:39:10,727 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:10,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:39:10,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:39:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:39:10,728 INFO L87 Difference]: Start difference. First operand 549 states and 904 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:39:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:10,968 INFO L93 Difference]: Finished difference Result 1055 states and 1742 transitions. [2021-11-12 22:39:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 96 [2021-11-12 22:39:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:10,975 INFO L225 Difference]: With dead ends: 1055 [2021-11-12 22:39:10,975 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 22:39:10,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:39:10,981 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 121 mSDsluCounter, 2528 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.15ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:10,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 3383 Invalid, 126 Unknown, 0 Unchecked, 11.15ms Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 165.38ms Time] [2021-11-12 22:39:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 22:39:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 22:39:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 430 states have (on average 1.6162790697674418) internal successors, (695), 449 states have internal predecessors, (695), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:39:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 880 transitions. [2021-11-12 22:39:11,013 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 880 transitions. Word has length 96 [2021-11-12 22:39:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:11,014 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 880 transitions. [2021-11-12 22:39:11,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:39:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 880 transitions. [2021-11-12 22:39:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:39:11,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:11,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:11,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:11,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:11,236 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1033134360, now seen corresponding path program 1 times [2021-11-12 22:39:11,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:11,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600648936] [2021-11-12 22:39:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:11,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:11,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:11,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:39:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:39:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:12,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:12,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:12,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600648936] [2021-11-12 22:39:12,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600648936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:12,446 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:12,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:39:12,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664438363] [2021-11-12 22:39:12,446 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:12,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:39:12,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:39:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:39:12,448 INFO L87 Difference]: Start difference. First operand 549 states and 880 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 22:39:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:12,641 INFO L93 Difference]: Finished difference Result 1046 states and 1704 transitions. [2021-11-12 22:39:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:39:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 98 [2021-11-12 22:39:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:12,649 INFO L225 Difference]: With dead ends: 1046 [2021-11-12 22:39:12,649 INFO L226 Difference]: Without dead ends: 528 [2021-11-12 22:39:12,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:39:12,657 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 89 mSDsluCounter, 5107 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5975 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:12,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5975 Invalid, 60 Unknown, 0 Unchecked, 27.42ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 96.84ms Time] [2021-11-12 22:39:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-12 22:39:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2021-11-12 22:39:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 409 states have (on average 1.6381418092909537) internal successors, (670), 428 states have internal predecessors, (670), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:39:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 855 transitions. [2021-11-12 22:39:12,693 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 855 transitions. Word has length 98 [2021-11-12 22:39:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:12,695 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 855 transitions. [2021-11-12 22:39:12,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 22:39:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 855 transitions. [2021-11-12 22:39:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:39:12,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:12,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:12,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:12,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:12,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash 51890384, now seen corresponding path program 1 times [2021-11-12 22:39:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:12,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810822058] [2021-11-12 22:39:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:12,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:12,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:12,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:39:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:39:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:13,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:14,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:14,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810822058] [2021-11-12 22:39:14,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810822058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:14,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:14,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:39:14,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407764921] [2021-11-12 22:39:14,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:14,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:39:14,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:39:14,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:39:14,281 INFO L87 Difference]: Start difference. First operand 528 states and 855 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:39:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:14,546 INFO L93 Difference]: Finished difference Result 1019 states and 1668 transitions. [2021-11-12 22:39:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:39:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 101 [2021-11-12 22:39:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:14,555 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 22:39:14,555 INFO L226 Difference]: Without dead ends: 528 [2021-11-12 22:39:14,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:39:14,565 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 45 mSDsluCounter, 6696 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7536 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:14,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 7536 Invalid, 113 Unknown, 0 Unchecked, 40.18ms Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 136.24ms Time] [2021-11-12 22:39:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-12 22:39:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2021-11-12 22:39:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 409 states have (on average 1.6356968215158925) internal successors, (669), 428 states have internal predecessors, (669), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-12 22:39:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 854 transitions. [2021-11-12 22:39:14,594 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 854 transitions. Word has length 101 [2021-11-12 22:39:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:14,595 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 854 transitions. [2021-11-12 22:39:14,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:39:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 854 transitions. [2021-11-12 22:39:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:39:14,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:14,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:14,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:14,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:14,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1288586370, now seen corresponding path program 1 times [2021-11-12 22:39:14,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:14,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200879491] [2021-11-12 22:39:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:14,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:14,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:14,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:14,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:39:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:39:15,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:15,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:16,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:16,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200879491] [2021-11-12 22:39:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200879491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:16,871 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:16,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:39:16,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093882283] [2021-11-12 22:39:16,871 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:16,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:39:16,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:16,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:39:16,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:39:16,873 INFO L87 Difference]: Start difference. First operand 528 states and 854 transitions. Second operand has 14 states, 14 states have (on average 10.142857142857142) internal successors, (142), 12 states have internal predecessors, (142), 8 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 22:39:18,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:20,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:22,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:27,368 INFO L93 Difference]: Finished difference Result 1150 states and 1914 transitions. [2021-11-12 22:39:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:39:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.142857142857142) internal successors, (142), 12 states have internal predecessors, (142), 8 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) Word has length 102 [2021-11-12 22:39:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:27,378 INFO L225 Difference]: With dead ends: 1150 [2021-11-12 22:39:27,378 INFO L226 Difference]: Without dead ends: 667 [2021-11-12 22:39:27,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:39:27,386 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 2064 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 703 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9636.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 3440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.97ms SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10247.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:27,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2064 Valid, 2363 Invalid, 3440 Unknown, 0 Unchecked, 31.97ms Time], IncrementalHoareTripleChecker [703 Valid, 2734 Invalid, 3 Unknown, 0 Unchecked, 10247.46ms Time] [2021-11-12 22:39:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-12 22:39:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 532. [2021-11-12 22:39:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 412 states have (on average 1.6310679611650485) internal successors, (672), 431 states have internal predecessors, (672), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (106), 89 states have call predecessors, (106), 90 states have call successors, (106) [2021-11-12 22:39:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 873 transitions. [2021-11-12 22:39:27,431 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 873 transitions. Word has length 102 [2021-11-12 22:39:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:27,432 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 873 transitions. [2021-11-12 22:39:27,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.142857142857142) internal successors, (142), 12 states have internal predecessors, (142), 8 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 22:39:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 873 transitions. [2021-11-12 22:39:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:39:27,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:27,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:27,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:27,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:27,660 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1080771376, now seen corresponding path program 1 times [2021-11-12 22:39:27,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:27,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926125656] [2021-11-12 22:39:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:27,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:27,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:27,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:39:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:28,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:28,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:39:29,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:29,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926125656] [2021-11-12 22:39:29,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926125656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:29,054 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:29,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 22:39:29,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965967587] [2021-11-12 22:39:29,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:29,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:39:29,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:29,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:39:29,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:39:29,056 INFO L87 Difference]: Start difference. First operand 532 states and 873 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-12 22:39:31,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:33,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:41,251 INFO L93 Difference]: Finished difference Result 1947 states and 3319 transitions. [2021-11-12 22:39:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:39:41,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 103 [2021-11-12 22:39:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:41,267 INFO L225 Difference]: With dead ends: 1947 [2021-11-12 22:39:41,267 INFO L226 Difference]: Without dead ends: 1460 [2021-11-12 22:39:41,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:41,274 INFO L933 BasicCegarLoop]: 1430 mSDtfsCounter, 4217 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 5156 mSolverCounterSat, 1288 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10596.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4303 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 6446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.49ms SdHoareTripleChecker+Time, 1288 IncrementalHoareTripleChecker+Valid, 5156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11706.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:41,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4303 Valid, 3587 Invalid, 6446 Unknown, 0 Unchecked, 50.49ms Time], IncrementalHoareTripleChecker [1288 Valid, 5156 Invalid, 2 Unknown, 0 Unchecked, 11706.88ms Time] [2021-11-12 22:39:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-12 22:39:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1371. [2021-11-12 22:39:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1057 states have (on average 1.6433301797540207) internal successors, (1737), 1105 states have internal predecessors, (1737), 249 states have call successors, (249), 63 states have call predecessors, (249), 64 states have return successors, (273), 239 states have call predecessors, (273), 244 states have call successors, (273) [2021-11-12 22:39:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2259 transitions. [2021-11-12 22:39:41,405 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2259 transitions. Word has length 103 [2021-11-12 22:39:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:41,405 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 2259 transitions. [2021-11-12 22:39:41,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-12 22:39:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2259 transitions. [2021-11-12 22:39:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 22:39:41,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:41,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:39:41,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:41,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:41,634 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash -105981864, now seen corresponding path program 1 times [2021-11-12 22:39:41,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:41,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916693591] [2021-11-12 22:39:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:41,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:41,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:41,636 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:41,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:39:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:39:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:39:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:39:48,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916693591] [2021-11-12 22:39:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916693591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:48,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:48,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 22:39:48,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872016714] [2021-11-12 22:39:48,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:48,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:39:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:39:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:39:48,563 INFO L87 Difference]: Start difference. First operand 1371 states and 2259 transitions. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 9 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 22:39:50,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:52,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:54,608 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:56,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:58,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:23,436 INFO L93 Difference]: Finished difference Result 4647 states and 7794 transitions. [2021-11-12 22:40:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 9 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 105 [2021-11-12 22:40:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:23,481 INFO L225 Difference]: With dead ends: 4647 [2021-11-12 22:40:23,482 INFO L226 Difference]: Without dead ends: 3321 [2021-11-12 22:40:23,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:40:23,495 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 2147 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 5539 mSolverCounterSat, 531 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30091.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2218 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 6075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.86ms SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 5539 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34109.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:23,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2218 Valid, 3218 Invalid, 6075 Unknown, 0 Unchecked, 47.86ms Time], IncrementalHoareTripleChecker [531 Valid, 5539 Invalid, 5 Unknown, 0 Unchecked, 34109.06ms Time] [2021-11-12 22:40:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-11-12 22:40:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2903. [2021-11-12 22:40:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2212 states have (on average 1.6469258589511755) internal successors, (3643), 2310 states have internal predecessors, (3643), 574 states have call successors, (574), 111 states have call predecessors, (574), 116 states have return successors, (631), 540 states have call predecessors, (631), 569 states have call successors, (631) [2021-11-12 22:40:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4848 transitions. [2021-11-12 22:40:23,781 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4848 transitions. Word has length 105 [2021-11-12 22:40:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:23,782 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 4848 transitions. [2021-11-12 22:40:23,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 9 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 22:40:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4848 transitions. [2021-11-12 22:40:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 22:40:23,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:23,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:23,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:24,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1479757800, now seen corresponding path program 1 times [2021-11-12 22:40:24,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:24,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050128861] [2021-11-12 22:40:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:24,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:24,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:24,006 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:24,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:40:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:40:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:25,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:25,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:25,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050128861] [2021-11-12 22:40:25,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050128861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:25,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:25,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:40:25,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118871629] [2021-11-12 22:40:25,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:25,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:25,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:25,563 INFO L87 Difference]: Start difference. First operand 2903 states and 4848 transitions. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:40:27,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:29,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:34,477 INFO L93 Difference]: Finished difference Result 8640 states and 14691 transitions. [2021-11-12 22:40:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:34,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 109 [2021-11-12 22:40:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:34,549 INFO L225 Difference]: With dead ends: 8640 [2021-11-12 22:40:34,550 INFO L226 Difference]: Without dead ends: 5784 [2021-11-12 22:40:34,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:40:34,574 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 3767 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 1004 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7789.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3878 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.18ms SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8419.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:34,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3878 Valid, 2819 Invalid, 3556 Unknown, 0 Unchecked, 31.18ms Time], IncrementalHoareTripleChecker [1004 Valid, 2550 Invalid, 2 Unknown, 0 Unchecked, 8419.75ms Time] [2021-11-12 22:40:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-11-12 22:40:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 4665. [2021-11-12 22:40:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 3489 states have (on average 1.636858698767555) internal successors, (5711), 3664 states have internal predecessors, (5711), 988 states have call successors, (988), 169 states have call predecessors, (988), 187 states have return successors, (1120), 952 states have call predecessors, (1120), 983 states have call successors, (1120) [2021-11-12 22:40:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 7819 transitions. [2021-11-12 22:40:35,072 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 7819 transitions. Word has length 109 [2021-11-12 22:40:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:35,072 INFO L470 AbstractCegarLoop]: Abstraction has 4665 states and 7819 transitions. [2021-11-12 22:40:35,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:40:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 7819 transitions. [2021-11-12 22:40:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 22:40:35,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:35,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:35,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:35,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:35,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1996926736, now seen corresponding path program 1 times [2021-11-12 22:40:35,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:35,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164771865] [2021-11-12 22:40:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:35,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:35,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:35,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:35,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:40:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:35,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:40:35,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:36,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:36,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:36,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164771865] [2021-11-12 22:40:36,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164771865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:36,965 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:36,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:40:36,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382257912] [2021-11-12 22:40:36,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:36,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:36,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:36,968 INFO L87 Difference]: Start difference. First operand 4665 states and 7819 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:40:39,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:41,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:43,052 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:48,318 INFO L93 Difference]: Finished difference Result 15830 states and 27138 transitions. [2021-11-12 22:40:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 110 [2021-11-12 22:40:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:48,416 INFO L225 Difference]: With dead ends: 15830 [2021-11-12 22:40:48,416 INFO L226 Difference]: Without dead ends: 11213 [2021-11-12 22:40:48,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:40:48,445 INFO L933 BasicCegarLoop]: 1602 mSDtfsCounter, 2310 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 3162 mSolverCounterSat, 663 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9889.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.17ms SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3162 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10563.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:48,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 3052 Invalid, 3828 Unknown, 0 Unchecked, 29.17ms Time], IncrementalHoareTripleChecker [663 Valid, 3162 Invalid, 3 Unknown, 0 Unchecked, 10563.53ms Time] [2021-11-12 22:40:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2021-11-12 22:40:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 8905. [2021-11-12 22:40:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8905 states, 6519 states have (on average 1.6257094646418162) internal successors, (10598), 6883 states have internal predecessors, (10598), 2045 states have call successors, (2045), 285 states have call predecessors, (2045), 340 states have return successors, (2382), 2006 states have call predecessors, (2382), 2040 states have call successors, (2382) [2021-11-12 22:40:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8905 states to 8905 states and 15025 transitions. [2021-11-12 22:40:49,609 INFO L78 Accepts]: Start accepts. Automaton has 8905 states and 15025 transitions. Word has length 110 [2021-11-12 22:40:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:49,610 INFO L470 AbstractCegarLoop]: Abstraction has 8905 states and 15025 transitions. [2021-11-12 22:40:49,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:40:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 8905 states and 15025 transitions. [2021-11-12 22:40:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:40:49,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:49,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:49,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:49,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:49,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash -763062371, now seen corresponding path program 1 times [2021-11-12 22:40:49,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:49,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266300764] [2021-11-12 22:40:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:49,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:49,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:49,845 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:49,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:40:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:40:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:50,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:51,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:51,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266300764] [2021-11-12 22:40:51,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266300764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:51,400 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:51,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:40:51,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496328264] [2021-11-12 22:40:51,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:51,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:51,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:51,403 INFO L87 Difference]: Start difference. First operand 8905 states and 15025 transitions. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:40:53,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:55,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:01,347 INFO L93 Difference]: Finished difference Result 34033 states and 58847 transitions. [2021-11-12 22:41:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:41:01,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 111 [2021-11-12 22:41:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:01,517 INFO L225 Difference]: With dead ends: 34033 [2021-11-12 22:41:01,517 INFO L226 Difference]: Without dead ends: 25178 [2021-11-12 22:41:01,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:01,564 INFO L933 BasicCegarLoop]: 1610 mSDtfsCounter, 3484 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 979 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7617.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3597 SdHoareTripleChecker+Valid, 2717 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.99ms SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8224.17ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:01,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3597 Valid, 2717 Invalid, 3432 Unknown, 0 Unchecked, 26.99ms Time], IncrementalHoareTripleChecker [979 Valid, 2451 Invalid, 2 Unknown, 0 Unchecked, 8224.17ms Time] [2021-11-12 22:41:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25178 states. [2021-11-12 22:41:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25178 to 19663. [2021-11-12 22:41:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19663 states, 14120 states have (on average 1.6162889518413597) internal successors, (22822), 14970 states have internal predecessors, (22822), 4858 states have call successors, (4858), 517 states have call predecessors, (4858), 684 states have return successors, (5802), 4814 states have call predecessors, (5802), 4853 states have call successors, (5802) [2021-11-12 22:41:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19663 states to 19663 states and 33482 transitions. [2021-11-12 22:41:03,672 INFO L78 Accepts]: Start accepts. Automaton has 19663 states and 33482 transitions. Word has length 111 [2021-11-12 22:41:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:03,673 INFO L470 AbstractCegarLoop]: Abstraction has 19663 states and 33482 transitions. [2021-11-12 22:41:03,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:41:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 19663 states and 33482 transitions. [2021-11-12 22:41:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:41:03,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:03,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:03,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:03,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:03,896 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:03,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1081740523, now seen corresponding path program 1 times [2021-11-12 22:41:03,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:03,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533573224] [2021-11-12 22:41:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:03,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:03,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:03,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:41:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:41:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:05,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:05,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:05,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533573224] [2021-11-12 22:41:05,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533573224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:05,937 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:05,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:41:05,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557664249] [2021-11-12 22:41:05,938 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:05,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:41:05,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:41:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:41:05,940 INFO L87 Difference]: Start difference. First operand 19663 states and 33482 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:41:07,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:17,823 INFO L93 Difference]: Finished difference Result 82596 states and 144063 transitions. [2021-11-12 22:41:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:41:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 112 [2021-11-12 22:41:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:18,584 INFO L225 Difference]: With dead ends: 82596 [2021-11-12 22:41:18,584 INFO L226 Difference]: Without dead ends: 62987 [2021-11-12 22:41:18,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:18,721 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 2262 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 3224 mSolverCounterSat, 615 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6168.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2376 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 3840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.77ms SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 3224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6818.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:18,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2376 Valid, 3214 Invalid, 3840 Unknown, 0 Unchecked, 27.77ms Time], IncrementalHoareTripleChecker [615 Valid, 3224 Invalid, 1 Unknown, 0 Unchecked, 6818.47ms Time] [2021-11-12 22:41:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2021-11-12 22:41:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 48421. [2021-11-12 22:41:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48421 states, 34309 states have (on average 1.6094319274825848) internal successors, (55218), 36457 states have internal predecessors, (55218), 12615 states have call successors, (12615), 981 states have call predecessors, (12615), 1496 states have return successors, (15420), 12558 states have call predecessors, (15420), 12610 states have call successors, (15420) [2021-11-12 22:41:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48421 states to 48421 states and 83253 transitions. [2021-11-12 22:41:25,187 INFO L78 Accepts]: Start accepts. Automaton has 48421 states and 83253 transitions. Word has length 112 [2021-11-12 22:41:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:25,188 INFO L470 AbstractCegarLoop]: Abstraction has 48421 states and 83253 transitions. [2021-11-12 22:41:25,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:41:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 48421 states and 83253 transitions. [2021-11-12 22:41:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:41:25,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:25,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:25,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:25,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:25,416 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:25,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2010370850, now seen corresponding path program 1 times [2021-11-12 22:41:25,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:25,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259995910] [2021-11-12 22:41:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:25,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:25,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:25,419 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:25,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f40eedd-143b-452b-b9fb-53a7be3450aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:41:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:41:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:26,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:26,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259995910] [2021-11-12 22:41:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259995910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:26,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:26,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:41:26,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206464920] [2021-11-12 22:41:26,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:26,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:41:26,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:41:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:41:26,834 INFO L87 Difference]: Start difference. First operand 48421 states and 83253 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-12 22:41:28,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:30,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:32,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:56,188 INFO L93 Difference]: Finished difference Result 218283 states and 383485 transitions. [2021-11-12 22:41:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:41:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 8 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 113 [2021-11-12 22:41:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:57,775 INFO L225 Difference]: With dead ends: 218283 [2021-11-12 22:41:57,776 INFO L226 Difference]: Without dead ends: 169924 [2021-11-12 22:41:58,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:58,035 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 2217 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 3232 mSolverCounterSat, 606 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10081.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2332 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.53ms SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 3232 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10719.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:58,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2332 Valid, 3243 Invalid, 3841 Unknown, 0 Unchecked, 25.53ms Time], IncrementalHoareTripleChecker [606 Valid, 3232 Invalid, 3 Unknown, 0 Unchecked, 10719.46ms Time] [2021-11-12 22:41:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169924 states.