./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:27,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:27,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:27,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:27,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:27,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:27,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:27,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:27,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:27,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:27,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:27,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:27,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:27,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:27,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:27,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:27,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:27,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:27,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:27,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:27,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:27,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:27,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:27,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:27,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:27,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:27,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:27,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:27,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:27,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:27,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:27,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:27,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:27,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:27,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:27,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:27,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:27,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:27,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:27,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:27,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:27,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:14:27,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:27,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:27,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:27,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:27,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:27,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:27,717 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:27,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:14:27,717 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:27,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:27,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:14:27,719 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:14:27,720 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:27,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:14:27,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:14:27,721 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:14:27,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:27,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:27,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:14:27,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:27,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:27,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:27,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:27,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:27,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:27,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:27,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:27,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:27,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:27,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:27,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:27,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:27,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:27,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:27,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:27,729 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:14:27,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:14:27,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:27,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:27,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:27,730 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_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-19 14:14:28,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:28,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:28,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:28,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:28,191 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:28,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-19 14:14:28,291 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/3b292f4be/954f3aee64a9481cbe488ea1ccb48911/FLAG150a80d7f [2021-11-19 14:14:29,057 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:29,057 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-19 14:14:29,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/3b292f4be/954f3aee64a9481cbe488ea1ccb48911/FLAG150a80d7f [2021-11-19 14:14:29,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/3b292f4be/954f3aee64a9481cbe488ea1ccb48911 [2021-11-19 14:14:29,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:29,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:29,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:29,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:29,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:29,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:29" (1/1) ... [2021-11-19 14:14:29,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230817b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:29, skipping insertion in model container [2021-11-19 14:14:29,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:29" (1/1) ... [2021-11-19 14:14:29,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:29,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:30,095 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-19 14:14:30,127 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:30,153 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:14:30,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@433ea090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:30, skipping insertion in model container [2021-11-19 14:14:30,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:30,155 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:30,158 INFO L158 Benchmark]: Toolchain (without parser) took 954.96ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 60.5MB in the beginning and 88.6MB in the end (delta: -28.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:30,160 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 96.5MB. Free memory is still 51.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:30,162 INFO L158 Benchmark]: CACSL2BoogieTranslator took 948.78ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 60.3MB in the beginning and 88.6MB in the end (delta: -28.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:14:30,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 96.5MB. Free memory is still 51.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 948.78ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 60.3MB in the beginning and 88.6MB in the end (delta: -28.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 179]: 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_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:33,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:33,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:33,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:33,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:33,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:33,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:33,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:33,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:33,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:33,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:33,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:33,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:33,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:33,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:33,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:33,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:33,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:33,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:33,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:33,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:33,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:33,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:33,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:33,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:33,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:33,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:33,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:33,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:33,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:33,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:33,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:33,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:33,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:33,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:33,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:33,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:33,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:33,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:33,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:33,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:33,180 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:33,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:33,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:33,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:33,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:33,246 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:33,246 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:33,246 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:33,247 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:33,247 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:33,247 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:33,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:33,251 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:33,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:33,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:33,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:33,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:33,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:33,252 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:33,253 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:33,253 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:33,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:33,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:33,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:33,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:33,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:33,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:33,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:33,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:33,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:33,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:33,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:33,256 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:33,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:33,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:33,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:33,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:33,258 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_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-19 14:14:33,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:33,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:33,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:33,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:33,783 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:33,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-19 14:14:33,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/2fc7d9fb3/d11d94057a97478ea232ea81a083867d/FLAG9774c46eb [2021-11-19 14:14:34,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:34,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-19 14:14:34,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/2fc7d9fb3/d11d94057a97478ea232ea81a083867d/FLAG9774c46eb [2021-11-19 14:14:35,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/data/2fc7d9fb3/d11d94057a97478ea232ea81a083867d [2021-11-19 14:14:35,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:35,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:35,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:35,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:35,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:35,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:35" (1/1) ... [2021-11-19 14:14:35,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67140239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:35, skipping insertion in model container [2021-11-19 14:14:35,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:35" (1/1) ... [2021-11-19 14:14:35,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:35,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:36,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-19 14:14:36,256 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:36,285 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:36,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:36,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-19 14:14:36,556 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:36,564 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:36,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-19 14:14:36,718 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:36,756 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:36,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36 WrapperNode [2021-11-19 14:14:36,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:36,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:36,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:36,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:36,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:36,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:36,873 INFO L137 Inliner]: procedures = 98, calls = 348, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 855 [2021-11-19 14:14:36,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:36,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:36,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:36,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:36,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:36,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:36,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:36,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:36,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:37,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:37,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:37,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:37,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:37,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:37,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:37,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (1/1) ... [2021-11-19 14:14:37,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:37,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:37,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:14:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:14:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:14:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:14:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:14:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:14:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:37,134 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:14:37,134 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:14:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:14:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:14:37,135 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:14:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:14:37,135 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:14:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:14:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:14:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:14:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:14:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:14:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 14:14:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 14:14:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:37,409 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:37,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:39,044 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:39,072 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:39,072 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:39,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:39 BoogieIcfgContainer [2021-11-19 14:14:39,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:39,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:39,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:39,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:39,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:35" (1/3) ... [2021-11-19 14:14:39,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aa03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:39, skipping insertion in model container [2021-11-19 14:14:39,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:36" (2/3) ... [2021-11-19 14:14:39,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aa03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:39, skipping insertion in model container [2021-11-19 14:14:39,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:39" (3/3) ... [2021-11-19 14:14:39,091 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2021-11-19 14:14:39,099 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:39,099 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:39,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:39,214 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:14:39,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 460 states have (on average 1.673913043478261) internal successors, (770), 481 states have internal predecessors, (770), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:14:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:14:39,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:39,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:39,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash -185393638, now seen corresponding path program 1 times [2021-11-19 14:14:39,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:39,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713208279] [2021-11-19 14:14:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:39,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:39,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:39,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:39,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:14:40,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:14:40,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:40,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713208279] [2021-11-19 14:14:40,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713208279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:40,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:40,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:40,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268739883] [2021-11-19 14:14:40,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:40,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:41,043 INFO L87 Difference]: Start difference. First operand has 594 states, 460 states have (on average 1.673913043478261) internal successors, (770), 481 states have internal predecessors, (770), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 14:14:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:41,193 INFO L93 Difference]: Finished difference Result 615 states and 1010 transitions. [2021-11-19 14:14:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2021-11-19 14:14:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:41,235 INFO L225 Difference]: With dead ends: 615 [2021-11-19 14:14:41,235 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:14:41,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:41,256 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:41,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:14:41,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 14:14:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.671806167400881) internal successors, (759), 473 states have internal predecessors, (759), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 964 transitions. [2021-11-19 14:14:41,442 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 964 transitions. Word has length 127 [2021-11-19 14:14:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:41,449 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 964 transitions. [2021-11-19 14:14:41,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 14:14:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 964 transitions. [2021-11-19 14:14:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:14:41,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:41,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:41,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:41,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:41,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1127490313, now seen corresponding path program 1 times [2021-11-19 14:14:41,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:41,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868488191] [2021-11-19 14:14:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:41,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:41,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:41,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:42,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:43,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:43,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868488191] [2021-11-19 14:14:43,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868488191] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:43,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:43,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:43,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037113345] [2021-11-19 14:14:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:43,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:43,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:43,183 INFO L87 Difference]: Start difference. First operand 586 states and 964 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:43,382 INFO L93 Difference]: Finished difference Result 1163 states and 1920 transitions. [2021-11-19 14:14:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2021-11-19 14:14:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:43,397 INFO L225 Difference]: With dead ends: 1163 [2021-11-19 14:14:43,397 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:14:43,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:43,411 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 14 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:43,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2843 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:14:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 14:14:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.669603524229075) internal successors, (758), 473 states have internal predecessors, (758), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 963 transitions. [2021-11-19 14:14:43,479 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 963 transitions. Word has length 129 [2021-11-19 14:14:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:43,480 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 963 transitions. [2021-11-19 14:14:43,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 963 transitions. [2021-11-19 14:14:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:14:43,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:43,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:43,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:14:43,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:43,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2130311401, now seen corresponding path program 1 times [2021-11-19 14:14:43,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:43,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141494991] [2021-11-19 14:14:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:43,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:43,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:43,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:44,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:44,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:45,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:45,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141494991] [2021-11-19 14:14:45,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141494991] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:45,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:45,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:45,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227620368] [2021-11-19 14:14:45,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:45,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:45,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:45,127 INFO L87 Difference]: Start difference. First operand 586 states and 963 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:45,234 INFO L93 Difference]: Finished difference Result 1163 states and 1918 transitions. [2021-11-19 14:14:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:45,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-19 14:14:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:45,243 INFO L225 Difference]: With dead ends: 1163 [2021-11-19 14:14:45,243 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:14:45,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:45,249 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 12 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:45,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2843 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:14:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 14:14:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.6674008810572687) internal successors, (757), 473 states have internal predecessors, (757), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 962 transitions. [2021-11-19 14:14:45,287 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 962 transitions. Word has length 131 [2021-11-19 14:14:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:45,287 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 962 transitions. [2021-11-19 14:14:45,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 962 transitions. [2021-11-19 14:14:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:14:45,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:45,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:45,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:45,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,519 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1124320887, now seen corresponding path program 1 times [2021-11-19 14:14:45,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:45,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419360394] [2021-11-19 14:14:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:45,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:46,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:46,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:46,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419360394] [2021-11-19 14:14:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419360394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:46,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:46,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:46,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380476309] [2021-11-19 14:14:46,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:46,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:46,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:46,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:46,909 INFO L87 Difference]: Start difference. First operand 586 states and 962 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:47,016 INFO L93 Difference]: Finished difference Result 1167 states and 1921 transitions. [2021-11-19 14:14:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-19 14:14:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:47,025 INFO L225 Difference]: With dead ends: 1167 [2021-11-19 14:14:47,025 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:14:47,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:47,042 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 13 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:47,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2843 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:14:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:14:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6601307189542485) internal successors, (762), 478 states have internal predecessors, (762), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 967 transitions. [2021-11-19 14:14:47,090 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 967 transitions. Word has length 133 [2021-11-19 14:14:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:47,090 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 967 transitions. [2021-11-19 14:14:47,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 967 transitions. [2021-11-19 14:14:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:14:47,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:47,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:47,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:47,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1149847903, now seen corresponding path program 1 times [2021-11-19 14:14:47,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:47,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195507552] [2021-11-19 14:14:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:47,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:47,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:47,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:47,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:48,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:48,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:48,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195507552] [2021-11-19 14:14:48,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195507552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:48,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:48,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:48,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195260626] [2021-11-19 14:14:48,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:48,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:48,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:48,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:48,645 INFO L87 Difference]: Start difference. First operand 592 states and 967 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:48,739 INFO L93 Difference]: Finished difference Result 1166 states and 1912 transitions. [2021-11-19 14:14:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2021-11-19 14:14:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:48,747 INFO L225 Difference]: With dead ends: 1166 [2021-11-19 14:14:48,747 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:14:48,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:48,752 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 8 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:48,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2844 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:14:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:14:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6579520697167756) internal successors, (761), 478 states have internal predecessors, (761), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 966 transitions. [2021-11-19 14:14:48,787 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 966 transitions. Word has length 134 [2021-11-19 14:14:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:48,787 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 966 transitions. [2021-11-19 14:14:48,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 966 transitions. [2021-11-19 14:14:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 14:14:48,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:48,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:48,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:49,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:49,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:49,019 INFO L85 PathProgramCache]: Analyzing trace with hash -210562675, now seen corresponding path program 1 times [2021-11-19 14:14:49,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:49,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133266847] [2021-11-19 14:14:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:49,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:49,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:49,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:49,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:50,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:50,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133266847] [2021-11-19 14:14:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133266847] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:50,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:50,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:50,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140700326] [2021-11-19 14:14:50,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:50,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:50,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:50,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:50,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:50,361 INFO L87 Difference]: Start difference. First operand 592 states and 966 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:50,450 INFO L93 Difference]: Finished difference Result 1166 states and 1911 transitions. [2021-11-19 14:14:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2021-11-19 14:14:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:50,458 INFO L225 Difference]: With dead ends: 1166 [2021-11-19 14:14:50,459 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:14:50,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:50,464 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 6 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:50,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2844 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:14:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:14:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6557734204793029) internal successors, (760), 478 states have internal predecessors, (760), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 965 transitions. [2021-11-19 14:14:50,498 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 965 transitions. Word has length 135 [2021-11-19 14:14:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:50,498 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 965 transitions. [2021-11-19 14:14:50,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 965 transitions. [2021-11-19 14:14:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:14:50,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:50,506 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:50,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:50,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:50,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 573131045, now seen corresponding path program 1 times [2021-11-19 14:14:50,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:50,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680790813] [2021-11-19 14:14:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:50,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:50,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:50,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:51,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:14:52,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:52,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680790813] [2021-11-19 14:14:52,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680790813] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:52,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:52,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:14:52,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248569523] [2021-11-19 14:14:52,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:52,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:52,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:52,272 INFO L87 Difference]: Start difference. First operand 592 states and 965 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:14:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:52,579 INFO L93 Difference]: Finished difference Result 1183 states and 1939 transitions. [2021-11-19 14:14:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:52,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2021-11-19 14:14:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:52,588 INFO L225 Difference]: With dead ends: 1183 [2021-11-19 14:14:52,589 INFO L226 Difference]: Without dead ends: 613 [2021-11-19 14:14:52,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:52,594 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 148 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5587 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:52,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5587 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-19 14:14:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 611. [2021-11-19 14:14:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 475 states have (on average 1.654736842105263) internal successors, (786), 496 states have internal predecessors, (786), 106 states have call successors, (106), 28 states have call predecessors, (106), 29 states have return successors, (104), 99 states have call predecessors, (104), 101 states have call successors, (104) [2021-11-19 14:14:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 996 transitions. [2021-11-19 14:14:52,633 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 996 transitions. Word has length 136 [2021-11-19 14:14:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:52,633 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 996 transitions. [2021-11-19 14:14:52,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:14:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 996 transitions. [2021-11-19 14:14:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:14:52,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:52,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:52,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:52,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:52,861 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash -67955098, now seen corresponding path program 1 times [2021-11-19 14:14:52,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:52,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087202153] [2021-11-19 14:14:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:52,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:52,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:52,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:14:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:53,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:14:53,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:14:54,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:54,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087202153] [2021-11-19 14:14:54,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087202153] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:54,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:54,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:14:54,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575096342] [2021-11-19 14:14:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:54,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:54,152 INFO L87 Difference]: Start difference. First operand 611 states and 996 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:54,261 INFO L93 Difference]: Finished difference Result 1196 states and 1961 transitions. [2021-11-19 14:14:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:54,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-11-19 14:14:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:54,273 INFO L225 Difference]: With dead ends: 1196 [2021-11-19 14:14:54,273 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 14:14:54,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:54,278 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 8 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:54,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2843 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 14:14:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-19 14:14:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6553911205073997) internal successors, (783), 493 states have internal predecessors, (783), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-19 14:14:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 989 transitions. [2021-11-19 14:14:54,312 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 989 transitions. Word has length 136 [2021-11-19 14:14:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 989 transitions. [2021-11-19 14:14:54,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 989 transitions. [2021-11-19 14:14:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:14:54,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:54,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:54,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:54,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:54,549 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:54,549 INFO L85 PathProgramCache]: Analyzing trace with hash 695176180, now seen corresponding path program 1 times [2021-11-19 14:14:54,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:54,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105892995] [2021-11-19 14:14:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:54,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:54,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:54,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:55,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:55,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:14:55,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:55,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105892995] [2021-11-19 14:14:55,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105892995] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:55,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:55,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:55,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357319831] [2021-11-19 14:14:55,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:55,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:55,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:55,810 INFO L87 Difference]: Start difference. First operand 607 states and 989 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:56,053 INFO L93 Difference]: Finished difference Result 1222 states and 2006 transitions. [2021-11-19 14:14:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:56,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-19 14:14:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:56,070 INFO L225 Difference]: With dead ends: 1222 [2021-11-19 14:14:56,070 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 14:14:56,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:56,077 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 134 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:56,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2651 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 14:14:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-19 14:14:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6448202959830867) internal successors, (778), 493 states have internal predecessors, (778), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-19 14:14:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 984 transitions. [2021-11-19 14:14:56,114 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 984 transitions. Word has length 137 [2021-11-19 14:14:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:56,115 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 984 transitions. [2021-11-19 14:14:56,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 984 transitions. [2021-11-19 14:14:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:14:56,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:56,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:56,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:56,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:56,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash -878076950, now seen corresponding path program 1 times [2021-11-19 14:14:56,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:56,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707573493] [2021-11-19 14:14:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:56,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:56,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:56,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:56,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:14:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:57,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:14:57,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:57,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707573493] [2021-11-19 14:14:57,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707573493] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:57,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:57,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:57,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129750288] [2021-11-19 14:14:57,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:57,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:57,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:57,525 INFO L87 Difference]: Start difference. First operand 607 states and 984 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:57,758 INFO L93 Difference]: Finished difference Result 1222 states and 1996 transitions. [2021-11-19 14:14:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:57,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2021-11-19 14:14:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:57,767 INFO L225 Difference]: With dead ends: 1222 [2021-11-19 14:14:57,768 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 14:14:57,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:57,773 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 128 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:57,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2651 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 14:14:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-19 14:14:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6342494714587739) internal successors, (773), 493 states have internal predecessors, (773), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-19 14:14:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 979 transitions. [2021-11-19 14:14:57,804 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 979 transitions. Word has length 139 [2021-11-19 14:14:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:57,804 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 979 transitions. [2021-11-19 14:14:57,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 979 transitions. [2021-11-19 14:14:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:14:57,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:57,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:57,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:58,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,035 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1935952428, now seen corresponding path program 1 times [2021-11-19 14:14:58,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:58,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445816633] [2021-11-19 14:14:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:58,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:58,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:58,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:14:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:58,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:14:59,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:59,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445816633] [2021-11-19 14:14:59,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445816633] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:59,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:59,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:59,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812840893] [2021-11-19 14:14:59,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:59,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:59,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:59,303 INFO L87 Difference]: Start difference. First operand 607 states and 979 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:59,520 INFO L93 Difference]: Finished difference Result 1243 states and 2017 transitions. [2021-11-19 14:14:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:59,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 141 [2021-11-19 14:14:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:59,530 INFO L225 Difference]: With dead ends: 1243 [2021-11-19 14:14:59,530 INFO L226 Difference]: Without dead ends: 637 [2021-11-19 14:14:59,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:59,537 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 143 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2661 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-19 14:14:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 622. [2021-11-19 14:14:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 488 states have (on average 1.6147540983606556) internal successors, (788), 507 states have internal predecessors, (788), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 993 transitions. [2021-11-19 14:14:59,573 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 993 transitions. Word has length 141 [2021-11-19 14:14:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:59,575 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 993 transitions. [2021-11-19 14:14:59,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 993 transitions. [2021-11-19 14:14:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:14:59,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:59,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:59,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:59,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:59,808 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:59,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:59,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1637201580, now seen corresponding path program 1 times [2021-11-19 14:14:59,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:59,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72360986] [2021-11-19 14:14:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:59,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:59,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:59,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:15:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:15:00,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:01,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:01,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72360986] [2021-11-19 14:15:01,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72360986] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:01,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:01,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:15:01,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505148112] [2021-11-19 14:15:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:01,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:15:01,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:15:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:15:01,225 INFO L87 Difference]: Start difference. First operand 622 states and 993 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:15:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:01,434 INFO L93 Difference]: Finished difference Result 1207 states and 1938 transitions. [2021-11-19 14:15:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-11-19 14:15:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:01,444 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:15:01,444 INFO L226 Difference]: Without dead ends: 616 [2021-11-19 14:15:01,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:01,449 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 131 mSDsluCounter, 4603 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5555 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:01,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5555 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-19 14:15:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 601. [2021-11-19 14:15:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.60813704496788) internal successors, (751), 486 states have internal predecessors, (751), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 956 transitions. [2021-11-19 14:15:01,489 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 956 transitions. Word has length 141 [2021-11-19 14:15:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:01,489 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 956 transitions. [2021-11-19 14:15:01,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:15:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 956 transitions. [2021-11-19 14:15:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:15:01,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:01,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:01,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:01,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,723 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 88504962, now seen corresponding path program 1 times [2021-11-19 14:15:01,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:01,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556383234] [2021-11-19 14:15:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:01,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:01,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:01,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:15:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:15:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:15:02,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:02,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556383234] [2021-11-19 14:15:02,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556383234] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:02,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:02,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:15:02,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037171398] [2021-11-19 14:15:02,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:02,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:02,983 INFO L87 Difference]: Start difference. First operand 601 states and 956 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:15:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:03,176 INFO L93 Difference]: Finished difference Result 1171 states and 1876 transitions. [2021-11-19 14:15:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:03,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 142 [2021-11-19 14:15:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:03,184 INFO L225 Difference]: With dead ends: 1171 [2021-11-19 14:15:03,185 INFO L226 Difference]: Without dead ends: 601 [2021-11-19 14:15:03,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:03,190 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 69 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:03,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2675 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-19 14:15:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-19 14:15:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.6059957173447537) internal successors, (750), 486 states have internal predecessors, (750), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 955 transitions. [2021-11-19 14:15:03,222 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 955 transitions. Word has length 142 [2021-11-19 14:15:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:03,223 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 955 transitions. [2021-11-19 14:15:03,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:15:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 955 transitions. [2021-11-19 14:15:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 14:15:03,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:03,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:03,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:03,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:03,448 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1279406639, now seen corresponding path program 1 times [2021-11-19 14:15:03,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:03,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839061583] [2021-11-19 14:15:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:03,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:03,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:03,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:15:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:03,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:15:04,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:15:04,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:04,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839061583] [2021-11-19 14:15:04,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839061583] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:04,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:04,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:15:04,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196345600] [2021-11-19 14:15:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:04,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:04,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:04,710 INFO L87 Difference]: Start difference. First operand 601 states and 955 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:15:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:04,830 INFO L93 Difference]: Finished difference Result 1171 states and 1875 transitions. [2021-11-19 14:15:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2021-11-19 14:15:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:04,838 INFO L225 Difference]: With dead ends: 1171 [2021-11-19 14:15:04,838 INFO L226 Difference]: Without dead ends: 601 [2021-11-19 14:15:04,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:04,843 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 67 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:04,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2675 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-19 14:15:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-19 14:15:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.6038543897216273) internal successors, (749), 486 states have internal predecessors, (749), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 954 transitions. [2021-11-19 14:15:04,872 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 954 transitions. Word has length 143 [2021-11-19 14:15:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:04,873 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 954 transitions. [2021-11-19 14:15:04,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:15:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 954 transitions. [2021-11-19 14:15:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:15:04,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:04,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:04,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:05,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:05,097 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1895082307, now seen corresponding path program 1 times [2021-11-19 14:15:05,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:05,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107204530] [2021-11-19 14:15:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:05,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:05,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:05,099 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:05,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:15:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:15:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:15:05,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:06,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:06,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107204530] [2021-11-19 14:15:06,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107204530] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:06,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:06,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:15:06,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714565925] [2021-11-19 14:15:06,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:06,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:15:06,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:06,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:15:06,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:06,724 INFO L87 Difference]: Start difference. First operand 601 states and 954 transitions. Second operand has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:15:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:07,042 INFO L93 Difference]: Finished difference Result 1176 states and 1882 transitions. [2021-11-19 14:15:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2021-11-19 14:15:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:07,051 INFO L225 Difference]: With dead ends: 1176 [2021-11-19 14:15:07,051 INFO L226 Difference]: Without dead ends: 612 [2021-11-19 14:15:07,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:15:07,058 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 109 mSDsluCounter, 5312 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6208 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:07,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6208 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-19 14:15:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 603. [2021-11-19 14:15:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 469 states have (on average 1.5991471215351811) internal successors, (750), 488 states have internal predecessors, (750), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 955 transitions. [2021-11-19 14:15:07,091 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 955 transitions. Word has length 144 [2021-11-19 14:15:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:07,092 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 955 transitions. [2021-11-19 14:15:07,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:15:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 955 transitions. [2021-11-19 14:15:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:15:07,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:07,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:07,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:07,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:07,325 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1191672762, now seen corresponding path program 1 times [2021-11-19 14:15:07,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:07,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40163553] [2021-11-19 14:15:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:07,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:07,328 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:07,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:15:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:15:08,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:08,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:08,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40163553] [2021-11-19 14:15:08,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40163553] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:08,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:08,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:15:08,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056233867] [2021-11-19 14:15:08,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:08,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:15:08,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:15:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:08,858 INFO L87 Difference]: Start difference. First operand 603 states and 955 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:15:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:09,146 INFO L93 Difference]: Finished difference Result 1168 states and 1863 transitions. [2021-11-19 14:15:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 145 [2021-11-19 14:15:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:09,152 INFO L225 Difference]: With dead ends: 1168 [2021-11-19 14:15:09,153 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 14:15:09,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:15:09,158 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 77 mSDsluCounter, 5318 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6216 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:09,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6216 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 14:15:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2021-11-19 14:15:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 471 states have (on average 1.59447983014862) internal successors, (751), 490 states have internal predecessors, (751), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 956 transitions. [2021-11-19 14:15:09,189 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 956 transitions. Word has length 145 [2021-11-19 14:15:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:09,189 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 956 transitions. [2021-11-19 14:15:09,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:15:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 956 transitions. [2021-11-19 14:15:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:15:09,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:09,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:09,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,420 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1921082585, now seen corresponding path program 1 times [2021-11-19 14:15:09,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:09,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465046111] [2021-11-19 14:15:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:09,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:09,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:09,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:15:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:10,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:10,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:10,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465046111] [2021-11-19 14:15:10,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465046111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:10,660 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:15:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297899933] [2021-11-19 14:15:10,660 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:10,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:15:10,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:15:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:10,662 INFO L87 Difference]: Start difference. First operand 605 states and 956 transitions. Second operand has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:10,849 INFO L93 Difference]: Finished difference Result 1114 states and 1790 transitions. [2021-11-19 14:15:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 146 [2021-11-19 14:15:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:10,857 INFO L225 Difference]: With dead ends: 1114 [2021-11-19 14:15:10,858 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:15:10,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:10,862 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 109 mSDsluCounter, 5439 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6349 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:10,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6349 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:15:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-19 14:15:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 464 states have (on average 1.6012931034482758) internal successors, (743), 483 states have internal predecessors, (743), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 948 transitions. [2021-11-19 14:15:10,891 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 948 transitions. Word has length 146 [2021-11-19 14:15:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:10,891 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 948 transitions. [2021-11-19 14:15:10,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 948 transitions. [2021-11-19 14:15:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:15:10,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:10,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:10,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:11,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:11,113 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1413226512, now seen corresponding path program 1 times [2021-11-19 14:15:11,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:11,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845899916] [2021-11-19 14:15:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:11,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:11,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:11,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:15:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:11,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:11,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:12,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:12,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845899916] [2021-11-19 14:15:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845899916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:12,403 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:12,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:15:12,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533965023] [2021-11-19 14:15:12,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:12,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:15:12,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:15:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:12,405 INFO L87 Difference]: Start difference. First operand 598 states and 948 transitions. Second operand has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:12,630 INFO L93 Difference]: Finished difference Result 1119 states and 1804 transitions. [2021-11-19 14:15:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 147 [2021-11-19 14:15:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:12,639 INFO L225 Difference]: With dead ends: 1119 [2021-11-19 14:15:12,639 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 14:15:12,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:12,644 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 171 mSDsluCounter, 5393 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6295 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:12,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6295 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 14:15:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-19 14:15:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 461 states have (on average 1.6008676789587852) internal successors, (738), 480 states have internal predecessors, (738), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 943 transitions. [2021-11-19 14:15:12,674 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 943 transitions. Word has length 147 [2021-11-19 14:15:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:12,674 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 943 transitions. [2021-11-19 14:15:12,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 943 transitions. [2021-11-19 14:15:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:15:12,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:12,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:12,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:12,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,907 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:12,907 INFO L85 PathProgramCache]: Analyzing trace with hash 152738960, now seen corresponding path program 1 times [2021-11-19 14:15:12,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:12,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810142417] [2021-11-19 14:15:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:12,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:12,909 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:15:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:13,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:13,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:14,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:14,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810142417] [2021-11-19 14:15:14,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810142417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:14,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:14,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:15:14,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768257095] [2021-11-19 14:15:14,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:14,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:15:14,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:15:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:15:14,084 INFO L87 Difference]: Start difference. First operand 595 states and 943 transitions. Second operand has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:15:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:14,237 INFO L93 Difference]: Finished difference Result 1116 states and 1799 transitions. [2021-11-19 14:15:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 147 [2021-11-19 14:15:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:14,245 INFO L225 Difference]: With dead ends: 1116 [2021-11-19 14:15:14,245 INFO L226 Difference]: Without dead ends: 587 [2021-11-19 14:15:14,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:14,250 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 176 mSDsluCounter, 3583 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4484 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:14,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 4484 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-19 14:15:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-19 14:15:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.6048565121412803) internal successors, (727), 472 states have internal predecessors, (727), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 932 transitions. [2021-11-19 14:15:14,279 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 932 transitions. Word has length 147 [2021-11-19 14:15:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:14,280 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 932 transitions. [2021-11-19 14:15:14,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:15:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 932 transitions. [2021-11-19 14:15:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:15:14,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:14,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:14,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:14,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:14,501 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 709291115, now seen corresponding path program 1 times [2021-11-19 14:15:14,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:14,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051358887] [2021-11-19 14:15:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:14,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:14,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:14,503 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:14,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:15:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:15:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:15,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:15,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:15,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051358887] [2021-11-19 14:15:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051358887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:15,842 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:15,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:15,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322725760] [2021-11-19 14:15:15,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:15,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:15,844 INFO L87 Difference]: Start difference. First operand 587 states and 932 transitions. Second operand has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:16,131 INFO L93 Difference]: Finished difference Result 1102 states and 1777 transitions. [2021-11-19 14:15:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 148 [2021-11-19 14:15:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:16,139 INFO L225 Difference]: With dead ends: 1102 [2021-11-19 14:15:16,139 INFO L226 Difference]: Without dead ends: 587 [2021-11-19 14:15:16,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:15:16,144 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 67 mSDsluCounter, 8815 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 9712 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:16,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 9712 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-19 14:15:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-19 14:15:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.6026490066225165) internal successors, (726), 472 states have internal predecessors, (726), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 931 transitions. [2021-11-19 14:15:16,172 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 931 transitions. Word has length 148 [2021-11-19 14:15:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:16,173 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 931 transitions. [2021-11-19 14:15:16,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 931 transitions. [2021-11-19 14:15:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:15:16,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:16,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:16,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:16,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:16,393 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash 82162414, now seen corresponding path program 1 times [2021-11-19 14:15:16,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:16,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943878584] [2021-11-19 14:15:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:16,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:16,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:16,395 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:16,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:15:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:15:16,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:17,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:17,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:17,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943878584] [2021-11-19 14:15:17,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943878584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:17,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:17,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:17,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060241987] [2021-11-19 14:15:17,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:17,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:17,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:17,712 INFO L87 Difference]: Start difference. First operand 587 states and 931 transitions. Second operand has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:18,032 INFO L93 Difference]: Finished difference Result 1146 states and 1834 transitions. [2021-11-19 14:15:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 149 [2021-11-19 14:15:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:18,041 INFO L225 Difference]: With dead ends: 1146 [2021-11-19 14:15:18,041 INFO L226 Difference]: Without dead ends: 584 [2021-11-19 14:15:18,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:15:18,046 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 101 mSDsluCounter, 8740 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 9625 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:18,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 9625 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-19 14:15:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2021-11-19 14:15:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 450 states have (on average 1.5955555555555556) internal successors, (718), 469 states have internal predecessors, (718), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 923 transitions. [2021-11-19 14:15:18,079 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 923 transitions. Word has length 149 [2021-11-19 14:15:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:18,080 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 923 transitions. [2021-11-19 14:15:18,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 923 transitions. [2021-11-19 14:15:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:15:18,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:18,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:18,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:18,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:18,301 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:18,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1497165040, now seen corresponding path program 1 times [2021-11-19 14:15:18,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:18,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120276456] [2021-11-19 14:15:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:18,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:18,303 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:18,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:15:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:19,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:19,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120276456] [2021-11-19 14:15:19,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120276456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:19,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:19,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:19,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103955335] [2021-11-19 14:15:19,552 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:19,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:19,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:19,554 INFO L87 Difference]: Start difference. First operand 584 states and 923 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:19,770 INFO L93 Difference]: Finished difference Result 1093 states and 1757 transitions. [2021-11-19 14:15:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 150 [2021-11-19 14:15:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:19,780 INFO L225 Difference]: With dead ends: 1093 [2021-11-19 14:15:19,780 INFO L226 Difference]: Without dead ends: 584 [2021-11-19 14:15:19,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:15:19,785 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 82 mSDsluCounter, 6157 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 7043 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:19,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 7043 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-19 14:15:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2021-11-19 14:15:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 450 states have (on average 1.5933333333333333) internal successors, (717), 469 states have internal predecessors, (717), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 922 transitions. [2021-11-19 14:15:19,813 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 922 transitions. Word has length 150 [2021-11-19 14:15:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 922 transitions. [2021-11-19 14:15:19,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 922 transitions. [2021-11-19 14:15:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:15:19,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:19,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:19,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:20,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:20,042 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash -376832801, now seen corresponding path program 1 times [2021-11-19 14:15:20,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:20,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932049412] [2021-11-19 14:15:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:20,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:20,044 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:20,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:15:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:20,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:21,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:21,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932049412] [2021-11-19 14:15:21,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932049412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:21,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:21,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:21,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340808204] [2021-11-19 14:15:21,292 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:21,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:21,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:21,294 INFO L87 Difference]: Start difference. First operand 584 states and 922 transitions. Second operand has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:21,505 INFO L93 Difference]: Finished difference Result 1131 states and 1802 transitions. [2021-11-19 14:15:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 151 [2021-11-19 14:15:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:21,513 INFO L225 Difference]: With dead ends: 1131 [2021-11-19 14:15:21,513 INFO L226 Difference]: Without dead ends: 581 [2021-11-19 14:15:21,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:15:21,517 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 113 mSDsluCounter, 7013 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 7897 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:21,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 7897 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-19 14:15:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-19 14:15:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 447 states have (on average 1.5861297539149888) internal successors, (709), 466 states have internal predecessors, (709), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:15:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 914 transitions. [2021-11-19 14:15:21,545 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 914 transitions. Word has length 151 [2021-11-19 14:15:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:21,546 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 914 transitions. [2021-11-19 14:15:21,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 914 transitions. [2021-11-19 14:15:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:15:21,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:21,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:21,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:21,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:21,773 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:21,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1757515659, now seen corresponding path program 1 times [2021-11-19 14:15:21,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:21,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556681258] [2021-11-19 14:15:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:21,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:21,775 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:21,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:15:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:22,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:23,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:23,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556681258] [2021-11-19 14:15:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556681258] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:23,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:23,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:23,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499173053] [2021-11-19 14:15:23,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:23,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:23,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:23,192 INFO L87 Difference]: Start difference. First operand 581 states and 914 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:24,187 INFO L93 Difference]: Finished difference Result 1086 states and 1769 transitions. [2021-11-19 14:15:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2021-11-19 14:15:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:24,193 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 14:15:24,194 INFO L226 Difference]: Without dead ends: 585 [2021-11-19 14:15:24,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:24,198 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 827 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 2232 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:15:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-19 14:15:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2021-11-19 14:15:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 450 states have (on average 1.5822222222222222) internal successors, (712), 469 states have internal predecessors, (712), 105 states have call successors, (105), 30 states have call predecessors, (105), 29 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-19 14:15:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 918 transitions. [2021-11-19 14:15:24,228 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 918 transitions. Word has length 152 [2021-11-19 14:15:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:24,228 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 918 transitions. [2021-11-19 14:15:24,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 918 transitions. [2021-11-19 14:15:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:15:24,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:24,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:24,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:24,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:24,455 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1096109369, now seen corresponding path program 1 times [2021-11-19 14:15:24,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:24,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508908353] [2021-11-19 14:15:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:24,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:24,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:24,457 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:24,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:15:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:25,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:25,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:25,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508908353] [2021-11-19 14:15:25,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508908353] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:25,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:25,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:25,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499127742] [2021-11-19 14:15:25,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:25,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:25,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:25,815 INFO L87 Difference]: Start difference. First operand 585 states and 918 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:26,841 INFO L93 Difference]: Finished difference Result 1095 states and 1776 transitions. [2021-11-19 14:15:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2021-11-19 14:15:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:26,846 INFO L225 Difference]: With dead ends: 1095 [2021-11-19 14:15:26,846 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 14:15:26,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:26,851 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 815 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:26,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2233 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:15:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 14:15:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-11-19 14:15:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 454 states have (on average 1.577092511013216) internal successors, (716), 473 states have internal predecessors, (716), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (102), 98 states have call predecessors, (102), 100 states have call successors, (102) [2021-11-19 14:15:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 923 transitions. [2021-11-19 14:15:26,884 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 923 transitions. Word has length 154 [2021-11-19 14:15:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:26,884 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 923 transitions. [2021-11-19 14:15:26,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 923 transitions. [2021-11-19 14:15:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:15:26,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:26,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:26,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:27,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:27,107 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash 420950325, now seen corresponding path program 1 times [2021-11-19 14:15:27,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:27,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105834056] [2021-11-19 14:15:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:27,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:27,143 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:27,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:15:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:27,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:28,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:28,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105834056] [2021-11-19 14:15:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105834056] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:28,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:28,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:28,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503077412] [2021-11-19 14:15:28,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:28,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:28,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:28,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:28,568 INFO L87 Difference]: Start difference. First operand 590 states and 923 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:29,512 INFO L93 Difference]: Finished difference Result 1106 states and 1785 transitions. [2021-11-19 14:15:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 156 [2021-11-19 14:15:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:29,518 INFO L225 Difference]: With dead ends: 1106 [2021-11-19 14:15:29,518 INFO L226 Difference]: Without dead ends: 596 [2021-11-19 14:15:29,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:29,521 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 819 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:29,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 2233 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:15:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-19 14:15:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-19 14:15:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 459 states have (on average 1.5708061002178648) internal successors, (721), 478 states have internal predecessors, (721), 105 states have call successors, (105), 32 states have call predecessors, (105), 31 states have return successors, (103), 98 states have call predecessors, (103), 100 states have call successors, (103) [2021-11-19 14:15:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 929 transitions. [2021-11-19 14:15:29,553 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 929 transitions. Word has length 156 [2021-11-19 14:15:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:29,554 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 929 transitions. [2021-11-19 14:15:29,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 929 transitions. [2021-11-19 14:15:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:15:29,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:29,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:29,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:29,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:29,783 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash 469638257, now seen corresponding path program 1 times [2021-11-19 14:15:29,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:29,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052567276] [2021-11-19 14:15:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:29,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:29,785 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:29,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:15:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:30,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:31,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:31,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052567276] [2021-11-19 14:15:31,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052567276] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:31,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:31,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:31,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226979394] [2021-11-19 14:15:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:31,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:31,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:31,134 INFO L87 Difference]: Start difference. First operand 596 states and 929 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:31,989 INFO L93 Difference]: Finished difference Result 1119 states and 1796 transitions. [2021-11-19 14:15:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 158 [2021-11-19 14:15:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:31,996 INFO L225 Difference]: With dead ends: 1119 [2021-11-19 14:15:31,996 INFO L226 Difference]: Without dead ends: 603 [2021-11-19 14:15:32,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:32,001 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 820 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:32,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 2233 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:15:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-19 14:15:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2021-11-19 14:15:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 465 states have (on average 1.5634408602150538) internal successors, (727), 484 states have internal predecessors, (727), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-19 14:15:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 936 transitions. [2021-11-19 14:15:32,033 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 936 transitions. Word has length 158 [2021-11-19 14:15:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:32,033 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 936 transitions. [2021-11-19 14:15:32,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 936 transitions. [2021-11-19 14:15:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-19 14:15:32,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:32,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:32,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:32,263 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash -201027595, now seen corresponding path program 1 times [2021-11-19 14:15:32,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:32,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220858989] [2021-11-19 14:15:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:32,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:32,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:32,266 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:32,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:15:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:32,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:15:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:15:34,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:34,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220858989] [2021-11-19 14:15:34,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220858989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:34,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149512399] [2021-11-19 14:15:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:34,495 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:34,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:34,496 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:34,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 14:15:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:15:35,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:15:36,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149512399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:36,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:15:36,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:15:36,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736512629] [2021-11-19 14:15:36,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:36,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:36,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:15:36,117 INFO L87 Difference]: Start difference. First operand 603 states and 936 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:15:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:36,741 INFO L93 Difference]: Finished difference Result 1122 states and 1779 transitions. [2021-11-19 14:15:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 160 [2021-11-19 14:15:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:36,746 INFO L225 Difference]: With dead ends: 1122 [2021-11-19 14:15:36,746 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:15:36,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:15:36,749 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1313 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:36,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 806 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:15:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:15:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-19 14:15:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 463 states have (on average 1.5593952483801297) internal successors, (722), 481 states have internal predecessors, (722), 103 states have call successors, (103), 33 states have call predecessors, (103), 32 states have return successors, (103), 97 states have call predecessors, (103), 99 states have call successors, (103) [2021-11-19 14:15:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 928 transitions. [2021-11-19 14:15:36,821 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 928 transitions. Word has length 160 [2021-11-19 14:15:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:36,822 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 928 transitions. [2021-11-19 14:15:36,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:15:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 928 transitions. [2021-11-19 14:15:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:15:36,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:36,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:36,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:37,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:37,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:37,250 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1937043287, now seen corresponding path program 1 times [2021-11-19 14:15:37,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:37,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672894716] [2021-11-19 14:15:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:37,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:37,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:37,253 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:37,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:15:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:15:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:38,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:15:39,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:39,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672894716] [2021-11-19 14:15:39,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672894716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:39,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1214282000] [2021-11-19 14:15:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:39,208 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:39,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:39,210 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:39,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:15:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:39,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:15:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:40,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:15:41,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1214282000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:41,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968291397] [2021-11-19 14:15:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:41,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:41,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:41,217 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:41,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 14:15:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:41,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:15:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:42,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:15:43,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968291397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:43,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:43,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:15:43,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486391827] [2021-11-19 14:15:43,213 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:43,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:15:43,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:15:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:15:43,216 INFO L87 Difference]: Start difference. First operand 599 states and 928 transitions. Second operand has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 14:15:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:54,758 INFO L93 Difference]: Finished difference Result 1902 states and 3071 transitions. [2021-11-19 14:15:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:15:54,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 161 [2021-11-19 14:15:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:54,772 INFO L225 Difference]: With dead ends: 1902 [2021-11-19 14:15:54,772 INFO L226 Difference]: Without dead ends: 1383 [2021-11-19 14:15:54,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 946 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:15:54,785 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 5353 mSDsluCounter, 5923 mSDsCounter, 0 mSdLazyCounter, 11042 mSolverCounterSat, 2063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5436 SdHoareTripleChecker+Valid, 7694 SdHoareTripleChecker+Invalid, 13105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2063 IncrementalHoareTripleChecker+Valid, 11042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:54,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5436 Valid, 7694 Invalid, 13105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2063 Valid, 11042 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-19 14:15:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-11-19 14:15:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1233. [2021-11-19 14:15:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 932 states have (on average 1.5804721030042919) internal successors, (1473), 971 states have internal predecessors, (1473), 235 states have call successors, (235), 59 states have call predecessors, (235), 65 states have return successors, (258), 233 states have call predecessors, (258), 231 states have call successors, (258) [2021-11-19 14:15:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1966 transitions. [2021-11-19 14:15:54,888 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1966 transitions. Word has length 161 [2021-11-19 14:15:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:54,889 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 1966 transitions. [2021-11-19 14:15:54,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 14:15:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1966 transitions. [2021-11-19 14:15:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:15:54,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:54,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:54,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:55,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-19 14:15:55,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:55,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:55,513 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1394864869, now seen corresponding path program 1 times [2021-11-19 14:15:55,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:55,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925203455] [2021-11-19 14:15:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:55,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:55,515 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:55,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:15:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:55,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:56,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:56,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:56,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925203455] [2021-11-19 14:15:56,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925203455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:56,761 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:56,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:15:56,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794583388] [2021-11-19 14:15:56,762 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:56,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:15:56,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:56,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:15:56,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:56,763 INFO L87 Difference]: Start difference. First operand 1233 states and 1966 transitions. Second operand has 10 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:15:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:56,932 INFO L93 Difference]: Finished difference Result 1755 states and 2805 transitions. [2021-11-19 14:15:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:15:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 163 [2021-11-19 14:15:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:56,938 INFO L225 Difference]: With dead ends: 1755 [2021-11-19 14:15:56,939 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:15:56,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:56,944 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 76 mSDsluCounter, 5988 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6855 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:56,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 6855 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:15:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:15:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 458 states have (on average 1.554585152838428) internal successors, (712), 476 states have internal predecessors, (712), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-19 14:15:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 914 transitions. [2021-11-19 14:15:56,978 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 914 transitions. Word has length 163 [2021-11-19 14:15:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:56,979 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 914 transitions. [2021-11-19 14:15:56,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:15:56,979 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 914 transitions. [2021-11-19 14:15:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:15:56,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:56,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:57,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:57,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:57,210 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1334925208, now seen corresponding path program 1 times [2021-11-19 14:15:57,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:57,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987901946] [2021-11-19 14:15:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:57,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:57,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:57,213 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:57,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:15:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:15:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:58,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:15:58,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:58,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987901946] [2021-11-19 14:15:58,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987901946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:58,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607094725] [2021-11-19 14:15:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:58,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:58,941 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:58,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 14:15:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:15:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:59,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:16:00,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [607094725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:00,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121935403] [2021-11-19 14:16:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:00,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:00,536 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:00,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 14:16:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:00,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:16:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:16:01,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:16:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121935403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:02,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:16:02,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:16:02,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532792071] [2021-11-19 14:16:02,056 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:16:02,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:16:02,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:16:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:02,058 INFO L87 Difference]: Start difference. First operand 592 states and 914 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 14:16:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:04,685 INFO L93 Difference]: Finished difference Result 1113 states and 1759 transitions. [2021-11-19 14:16:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:04,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) Word has length 169 [2021-11-19 14:16:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:04,692 INFO L225 Difference]: With dead ends: 1113 [2021-11-19 14:16:04,692 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:16:04,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:16:04,696 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1329 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:04,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1329 Valid, 2284 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:16:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:16:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 596. [2021-11-19 14:16:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 461 states have (on average 1.5509761388286334) internal successors, (715), 479 states have internal predecessors, (715), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (106), 96 states have call predecessors, (106), 97 states have call successors, (106) [2021-11-19 14:16:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 922 transitions. [2021-11-19 14:16:04,735 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 922 transitions. Word has length 169 [2021-11-19 14:16:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:04,736 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 922 transitions. [2021-11-19 14:16:04,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 14:16:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 922 transitions. [2021-11-19 14:16:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:16:04,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:04,741 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:04,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:04,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 14:16:05,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:05,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:05,369 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash 481778359, now seen corresponding path program 1 times [2021-11-19 14:16:05,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:05,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483037970] [2021-11-19 14:16:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:05,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:05,372 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:05,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 14:16:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:16:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:16:06,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:16:06,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:06,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483037970] [2021-11-19 14:16:06,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483037970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:06,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823362965] [2021-11-19 14:16:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:06,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:06,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:06,687 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:06,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 14:16:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:16:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:16:07,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:16:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823362965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:08,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911623857] [2021-11-19 14:16:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:08,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:08,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:08,007 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:08,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 14:16:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:08,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:16:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:16:08,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:16:09,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911623857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:09,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:16:09,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:16:09,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147134869] [2021-11-19 14:16:09,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:16:09,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:16:09,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:09,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:16:09,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:09,330 INFO L87 Difference]: Start difference. First operand 596 states and 922 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-19 14:16:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:15,004 INFO L93 Difference]: Finished difference Result 2143 states and 3445 transitions. [2021-11-19 14:16:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:16:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) Word has length 170 [2021-11-19 14:16:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:15,016 INFO L225 Difference]: With dead ends: 2143 [2021-11-19 14:16:15,016 INFO L226 Difference]: Without dead ends: 1625 [2021-11-19 14:16:15,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:16:15,021 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 5712 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 4330 mSolverCounterSat, 1729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5801 SdHoareTripleChecker+Valid, 3014 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1729 IncrementalHoareTripleChecker+Valid, 4330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:15,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5801 Valid, 3014 Invalid, 6059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1729 Valid, 4330 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 14:16:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-19 14:16:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1567. [2021-11-19 14:16:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1203 states have (on average 1.57190357439734) internal successors, (1891), 1248 states have internal predecessors, (1891), 277 states have call successors, (277), 86 states have call predecessors, (277), 86 states have return successors, (312), 269 states have call predecessors, (312), 273 states have call successors, (312) [2021-11-19 14:16:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2480 transitions. [2021-11-19 14:16:15,189 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2480 transitions. Word has length 170 [2021-11-19 14:16:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:15,190 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 2480 transitions. [2021-11-19 14:16:15,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-19 14:16:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2480 transitions. [2021-11-19 14:16:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:16:15,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:15,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:15,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:15,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-19 14:16:15,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-19 14:16:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:15,817 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 632402719, now seen corresponding path program 1 times [2021-11-19 14:16:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:15,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422872198] [2021-11-19 14:16:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:15,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:15,819 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:15,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 14:16:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:16:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:16:18,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:16:24,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:24,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422872198] [2021-11-19 14:16:24,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422872198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:24,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:24,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-19 14:16:24,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186204292] [2021-11-19 14:16:24,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:16:24,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:24,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:16:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:24,013 INFO L87 Difference]: Start difference. First operand 1567 states and 2480 transitions. Second operand has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-19 14:16:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:33,370 INFO L93 Difference]: Finished difference Result 7301 states and 11815 transitions. [2021-11-19 14:16:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:16:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) Word has length 172 [2021-11-19 14:16:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:33,417 INFO L225 Difference]: With dead ends: 7301 [2021-11-19 14:16:33,418 INFO L226 Difference]: Without dead ends: 5812 [2021-11-19 14:16:33,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:16:33,428 INFO L933 BasicCegarLoop]: 1532 mSDtfsCounter, 7930 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 6129 mSolverCounterSat, 2187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8048 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 8316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2187 IncrementalHoareTripleChecker+Valid, 6129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:33,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8048 Valid, 3451 Invalid, 8316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2187 Valid, 6129 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-19 14:16:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-11-19 14:16:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5459. [2021-11-19 14:16:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 4175 states have (on average 1.5952095808383233) internal successors, (6660), 4331 states have internal predecessors, (6660), 1005 states have call successors, (1005), 281 states have call predecessors, (1005), 278 states have return successors, (1133), 915 states have call predecessors, (1133), 1001 states have call successors, (1133) [2021-11-19 14:16:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 8798 transitions. [2021-11-19 14:16:33,973 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 8798 transitions. Word has length 172 [2021-11-19 14:16:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:33,974 INFO L470 AbstractCegarLoop]: Abstraction has 5459 states and 8798 transitions. [2021-11-19 14:16:33,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-19 14:16:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 8798 transitions. [2021-11-19 14:16:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 14:16:33,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:33,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:34,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:34,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:34,202 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash 712897035, now seen corresponding path program 1 times [2021-11-19 14:16:34,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:34,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133920743] [2021-11-19 14:16:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:34,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:34,204 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:34,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 14:16:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:16:35,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:16:35,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:35,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133920743] [2021-11-19 14:16:35,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133920743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:35,801 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:35,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:16:35,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492648731] [2021-11-19 14:16:35,802 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:35,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:16:35,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:16:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:35,804 INFO L87 Difference]: Start difference. First operand 5459 states and 8798 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:16:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:43,504 INFO L93 Difference]: Finished difference Result 16626 states and 27449 transitions. [2021-11-19 14:16:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:16:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) Word has length 176 [2021-11-19 14:16:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:43,595 INFO L225 Difference]: With dead ends: 16626 [2021-11-19 14:16:43,595 INFO L226 Difference]: Without dead ends: 11227 [2021-11-19 14:16:43,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:16:43,630 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 3293 mSDsluCounter, 2606 mSDsCounter, 0 mSdLazyCounter, 7138 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 4212 SdHoareTripleChecker+Invalid, 8130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 7138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:43,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3407 Valid, 4212 Invalid, 8130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 7138 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 14:16:43,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11227 states. [2021-11-19 14:16:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11227 to 10212. [2021-11-19 14:16:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10212 states, 7669 states have (on average 1.58638675185813) internal successors, (12166), 8008 states have internal predecessors, (12166), 2033 states have call successors, (2033), 476 states have call predecessors, (2033), 509 states have return successors, (2375), 1894 states have call predecessors, (2375), 2029 states have call successors, (2375) [2021-11-19 14:16:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10212 states to 10212 states and 16574 transitions. [2021-11-19 14:16:44,736 INFO L78 Accepts]: Start accepts. Automaton has 10212 states and 16574 transitions. Word has length 176 [2021-11-19 14:16:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:44,737 INFO L470 AbstractCegarLoop]: Abstraction has 10212 states and 16574 transitions. [2021-11-19 14:16:44,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:16:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 10212 states and 16574 transitions. [2021-11-19 14:16:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 14:16:44,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:44,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:44,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:44,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:44,957 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash -503256691, now seen corresponding path program 1 times [2021-11-19 14:16:44,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:44,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006742671] [2021-11-19 14:16:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:44,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:44,959 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:44,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:16:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:16:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:16:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:16:46,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:46,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006742671] [2021-11-19 14:16:46,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006742671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:46,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:46,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 14:16:46,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640570198] [2021-11-19 14:16:46,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:16:46,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:16:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:16:46,982 INFO L87 Difference]: Start difference. First operand 10212 states and 16574 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:16:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:51,272 INFO L93 Difference]: Finished difference Result 17764 states and 28833 transitions. [2021-11-19 14:16:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:16:51,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) Word has length 176 [2021-11-19 14:16:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:51,347 INFO L225 Difference]: With dead ends: 17764 [2021-11-19 14:16:51,348 INFO L226 Difference]: Without dead ends: 10182 [2021-11-19 14:16:51,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:16:51,383 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 1322 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 4683 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 3170 SdHoareTripleChecker+Invalid, 5065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 4683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:51,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 3170 Invalid, 5065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 4683 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 14:16:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10182 states. [2021-11-19 14:16:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10182 to 10182. [2021-11-19 14:16:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 7654 states have (on average 1.5855761693232298) internal successors, (12136), 7993 states have internal predecessors, (12136), 2018 states have call successors, (2018), 476 states have call predecessors, (2018), 509 states have return successors, (2360), 1879 states have call predecessors, (2360), 2014 states have call successors, (2360) [2021-11-19 14:16:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 16514 transitions. [2021-11-19 14:16:52,278 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 16514 transitions. Word has length 176 [2021-11-19 14:16:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:52,279 INFO L470 AbstractCegarLoop]: Abstraction has 10182 states and 16514 transitions. [2021-11-19 14:16:52,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:16:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 16514 transitions. [2021-11-19 14:16:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:16:52,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:52,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:52,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:52,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,501 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1298898818, now seen corresponding path program 1 times [2021-11-19 14:16:52,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:52,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939050128] [2021-11-19 14:16:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:52,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:52,503 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:52,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:16:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:16:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:16:53,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:16:54,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:54,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939050128] [2021-11-19 14:16:54,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939050128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:54,225 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:54,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:16:54,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352198586] [2021-11-19 14:16:54,225 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:54,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:54,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:54,226 INFO L87 Difference]: Start difference. First operand 10182 states and 16514 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:16:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:59,311 INFO L93 Difference]: Finished difference Result 33948 states and 56563 transitions. [2021-11-19 14:16:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:16:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 183 [2021-11-19 14:16:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:59,518 INFO L225 Difference]: With dead ends: 33948 [2021-11-19 14:16:59,519 INFO L226 Difference]: Without dead ends: 23835 [2021-11-19 14:16:59,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:59,575 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 4006 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 3676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:59,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4119 Valid, 2500 Invalid, 3676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 14:16:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23835 states. [2021-11-19 14:17:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23835 to 21281. [2021-11-19 14:17:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21281 states, 15710 states have (on average 1.578294080203692) internal successors, (24795), 16502 states have internal predecessors, (24795), 4563 states have call successors, (4563), 869 states have call predecessors, (4563), 1007 states have return successors, (5537), 4326 states have call predecessors, (5537), 4559 states have call successors, (5537) [2021-11-19 14:17:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21281 states to 21281 states and 34895 transitions. [2021-11-19 14:17:01,578 INFO L78 Accepts]: Start accepts. Automaton has 21281 states and 34895 transitions. Word has length 183 [2021-11-19 14:17:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:01,579 INFO L470 AbstractCegarLoop]: Abstraction has 21281 states and 34895 transitions. [2021-11-19 14:17:01,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:17:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 21281 states and 34895 transitions. [2021-11-19 14:17:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:17:01,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:01,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:01,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-19 14:17:01,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:01,801 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1253306110, now seen corresponding path program 1 times [2021-11-19 14:17:01,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:01,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527333085] [2021-11-19 14:17:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:01,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:01,803 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:01,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:17:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:17:02,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:17:03,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:17:03,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:03,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527333085] [2021-11-19 14:17:03,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527333085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:03,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:03,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:17:03,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952756535] [2021-11-19 14:17:03,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:03,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:17:03,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:17:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:03,787 INFO L87 Difference]: Start difference. First operand 21281 states and 34895 transitions. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:17:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:11,391 INFO L93 Difference]: Finished difference Result 77005 states and 130016 transitions. [2021-11-19 14:17:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 184 [2021-11-19 14:17:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:11,828 INFO L225 Difference]: With dead ends: 77005 [2021-11-19 14:17:11,828 INFO L226 Difference]: Without dead ends: 55801 [2021-11-19 14:17:11,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:11,961 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 3967 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:11,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4081 Valid, 2620 Invalid, 3684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:17:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55801 states. [2021-11-19 14:17:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55801 to 48405. [2021-11-19 14:17:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48405 states, 35176 states have (on average 1.571639754377985) internal successors, (55284), 37120 states have internal predecessors, (55284), 11090 states have call successors, (11090), 1658 states have call predecessors, (11090), 2138 states have return successors, (13990), 10693 states have call predecessors, (13990), 11086 states have call successors, (13990) [2021-11-19 14:17:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48405 states to 48405 states and 80364 transitions. [2021-11-19 14:17:17,170 INFO L78 Accepts]: Start accepts. Automaton has 48405 states and 80364 transitions. Word has length 184 [2021-11-19 14:17:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:17,172 INFO L470 AbstractCegarLoop]: Abstraction has 48405 states and 80364 transitions. [2021-11-19 14:17:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:17:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 48405 states and 80364 transitions. [2021-11-19 14:17:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:17:17,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:17,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:17,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:17,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:17,401 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1104694855, now seen corresponding path program 1 times [2021-11-19 14:17:17,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:17,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914835335] [2021-11-19 14:17:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:17,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:17,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:17,403 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:17,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74846ceb-aea6-4f46-b028-c7cc1af7a0f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:17:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:17:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:17:18,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:17:18,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:18,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914835335] [2021-11-19 14:17:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914835335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:18,832 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:18,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:17:18,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893293704] [2021-11-19 14:17:18,833 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:18,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:17:18,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:17:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:18,835 INFO L87 Difference]: Start difference. First operand 48405 states and 80364 transitions. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:17:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:36,431 INFO L93 Difference]: Finished difference Result 188286 states and 322256 transitions. [2021-11-19 14:17:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 185 [2021-11-19 14:17:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:37,632 INFO L225 Difference]: With dead ends: 188286 [2021-11-19 14:17:37,632 INFO L226 Difference]: Without dead ends: 139968 [2021-11-19 14:17:37,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:37,885 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 3787 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3902 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 3695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:37,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3902 Valid, 2789 Invalid, 3695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 14:17:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139968 states.