./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:15:00,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:15:00,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:15:00,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:15:00,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:15:00,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:15:00,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:15:00,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:15:00,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:15:00,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:15:00,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:15:00,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:15:00,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:15:00,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:15:00,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:15:00,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:15:00,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:15:00,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:15:00,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:15:00,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:15:00,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:15:00,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:15:00,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:15:00,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:15:00,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:15:00,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:15:00,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:15:00,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:15:00,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:15:00,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:15:00,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:15:00,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:15:00,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:15:00,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:15:00,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:15:00,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:15:00,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:15:00,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:15:00,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:15:00,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:15:00,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:15:00,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:15:00,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:15:00,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:15:00,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:15:00,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:15:00,739 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:15:00,740 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:15:00,740 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:15:00,740 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:15:00,740 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:15:00,741 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:15:00,742 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:15:00,742 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:15:00,743 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:15:00,743 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:15:00,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:15:00,743 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:15:00,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:15:00,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:15:00,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:15:00,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:15:00,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:15:00,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:15:00,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:15:00,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:15:00,746 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:15:00,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:15:00,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:15:00,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:15:00,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:15:00,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:15:00,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:15:00,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:15:00,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:15:00,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:15:00,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:15:00,751 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:15:00,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:15:00,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:15:00,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:15:00,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:15:00,752 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_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2021-11-12 23:15:01,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:15:01,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:15:01,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:15:01,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:15:01,114 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:15:01,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-12 23:15:01,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/349b371cd/f148a307181a4a869bd61ee9d2703819/FLAGeb465cd16 [2021-11-12 23:15:02,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:15:02,040 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-12 23:15:02,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/349b371cd/f148a307181a4a869bd61ee9d2703819/FLAGeb465cd16 [2021-11-12 23:15:02,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/349b371cd/f148a307181a4a869bd61ee9d2703819 [2021-11-12 23:15:02,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:15:02,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:15:02,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:02,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:15:02,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:15:02,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:02" (1/1) ... [2021-11-12 23:15:02,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7015c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:02, skipping insertion in model container [2021-11-12 23:15:02,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:02" (1/1) ... [2021-11-12 23:15:02,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:15:02,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:15:02,628 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-12 23:15:03,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:03,053 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:15:03,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62e01ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:03, skipping insertion in model container [2021-11-12 23:15:03,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:03,054 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:15:03,057 INFO L158 Benchmark]: Toolchain (without parser) took 921.08ms. Allocated memory is still 94.4MB. Free memory was 71.5MB in the beginning and 54.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:15:03,059 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory is still 70.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:15:03,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 915.60ms. Allocated memory is still 94.4MB. Free memory was 71.5MB in the beginning and 54.5MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:15:03,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory is still 70.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 915.60ms. Allocated memory is still 94.4MB. Free memory was 71.5MB in the beginning and 54.5MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2473]: 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_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:15:05,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:15:05,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:15:05,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:15:05,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:15:05,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:15:05,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:15:05,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:15:05,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:15:05,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:15:05,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:15:05,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:15:05,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:15:05,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:15:05,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:15:05,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:15:05,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:15:05,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:15:05,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:15:05,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:15:05,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:15:05,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:15:05,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:15:05,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:15:05,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:15:05,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:15:05,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:15:05,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:15:05,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:15:05,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:15:05,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:15:05,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:15:05,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:15:05,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:15:05,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:15:05,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:15:05,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:15:05,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:15:05,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:15:05,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:15:05,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:15:05,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:15:05,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:15:05,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:15:05,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:15:05,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:15:05,912 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:15:05,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:15:05,913 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:15:05,913 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:15:05,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:15:05,913 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:15:05,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:15:05,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:15:05,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:15:05,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:15:05,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:15:05,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:15:05,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:15:05,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:15:05,916 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:15:05,916 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:15:05,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:15:05,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:15:05,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:15:05,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:15:05,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:15:05,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:15:05,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:15:05,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:15:05,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:15:05,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:15:05,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:15:05,919 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:15:05,920 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:15:05,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:15:05,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:15:05,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:15:05,921 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_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2021-11-12 23:15:06,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:15:06,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:15:06,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:15:06,401 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:15:06,402 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:15:06,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-12 23:15:06,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/4357e5359/a08e8bc061f14243ba3cecabc2843b83/FLAGb69d1af04 [2021-11-12 23:15:07,304 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:15:07,310 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-12 23:15:07,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/4357e5359/a08e8bc061f14243ba3cecabc2843b83/FLAGb69d1af04 [2021-11-12 23:15:07,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/data/4357e5359/a08e8bc061f14243ba3cecabc2843b83 [2021-11-12 23:15:07,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:15:07,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:15:07,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:07,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:15:07,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:15:07,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:07" (1/1) ... [2021-11-12 23:15:07,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c439cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:07, skipping insertion in model container [2021-11-12 23:15:07,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:07" (1/1) ... [2021-11-12 23:15:07,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:15:07,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:15:07,742 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-12 23:15:08,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:08,217 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:15:08,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:15:08,262 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-12 23:15:08,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:08,469 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:15:08,484 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-12 23:15:08,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:08,589 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:15:08,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08 WrapperNode [2021-11-12 23:15:08,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:08,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:15:08,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:15:08,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:15:08,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:15:08,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:15:08,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:15:08,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:15:08,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:15:08,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:15:08,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:15:08,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:15:08,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (1/1) ... [2021-11-12 23:15:08,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:15:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:15:08,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:15:08,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:15:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:15:08,951 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:15:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:15:08,951 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:15:08,952 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:15:08,952 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:15:08,952 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:15:08,952 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:15:08,952 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:15:08,953 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:15:08,953 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:15:08,954 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:15:08,954 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:15:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:15:08,955 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:15:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:15:08,955 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:15:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:15:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:15:08,956 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:15:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:15:08,956 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:15:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:15:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:15:08,957 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:15:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:15:08,957 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:15:08,958 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:15:08,958 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:15:08,958 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:15:08,958 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:15:08,958 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:15:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:15:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:15:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:15:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:15:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:15:08,960 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:15:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:15:08,960 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:15:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:15:08,960 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:15:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:15:08,961 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:15:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:15:08,961 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:15:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:15:08,961 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:15:08,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:15:08,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:15:08,962 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:15:08,962 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:15:08,962 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:15:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:15:13,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:15:13,205 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:15:13,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:15:13 BoogieIcfgContainer [2021-11-12 23:15:13,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:15:13,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:15:13,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:15:13,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:15:13,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:15:07" (1/3) ... [2021-11-12 23:15:13,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1eb7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:15:13, skipping insertion in model container [2021-11-12 23:15:13,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:08" (2/3) ... [2021-11-12 23:15:13,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1eb7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:15:13, skipping insertion in model container [2021-11-12 23:15:13,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:15:13" (3/3) ... [2021-11-12 23:15:13,222 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2021-11-12 23:15:13,228 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:15:13,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:15:13,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:15:13,319 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:15:13,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:15:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 612 states, 474 states have (on average 1.6729957805907174) internal successors, (793), 497 states have internal predecessors, (793), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 23:15:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:15:13,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:13,406 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:13,407 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1600471716, now seen corresponding path program 1 times [2021-11-12 23:15:13,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:13,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141738063] [2021-11-12 23:15:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:13,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:13,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:13,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:15:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:15:14,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:15:14,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:15:14,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:14,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141738063] [2021-11-12 23:15:14,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141738063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:14,723 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:14,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:15:14,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953768184] [2021-11-12 23:15:14,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:14,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:15:14,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:15:14,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:15:14,762 INFO L87 Difference]: Start difference. First operand has 612 states, 474 states have (on average 1.6729957805907174) internal successors, (793), 497 states have internal predecessors, (793), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:15:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:14,842 INFO L93 Difference]: Finished difference Result 633 states and 1039 transitions. [2021-11-12 23:15:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:15:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-12 23:15:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:14,880 INFO L225 Difference]: With dead ends: 633 [2021-11-12 23:15:14,881 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 23:15:14,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:15:14,892 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.23ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:14,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 8.23ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:15:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 23:15:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-12 23:15:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 468 states have (on average 1.670940170940171) internal successors, (782), 489 states have internal predecessors, (782), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 993 transitions. [2021-11-12 23:15:15,081 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 993 transitions. Word has length 83 [2021-11-12 23:15:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 993 transitions. [2021-11-12 23:15:15,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:15:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 993 transitions. [2021-11-12 23:15:15,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:15:15,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:15,102 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:15,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:15:15,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:15,319 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash -204438056, now seen corresponding path program 1 times [2021-11-12 23:15:15,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:15,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813628875] [2021-11-12 23:15:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:15,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:15,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:15,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:15,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:15:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:15:16,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:15:16,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:16,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813628875] [2021-11-12 23:15:16,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813628875] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:16,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:16,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:16,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617665106] [2021-11-12 23:15:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:16,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:16,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:16,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:16,583 INFO L87 Difference]: Start difference. First operand 604 states and 993 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:16,753 INFO L93 Difference]: Finished difference Result 1199 states and 1978 transitions. [2021-11-12 23:15:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-12 23:15:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:16,764 INFO L225 Difference]: With dead ends: 1199 [2021-11-12 23:15:16,764 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 23:15:16,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:16,776 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 14 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2930 Invalid, 35 Unknown, 0 Unchecked, 26.95ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 46.70ms Time] [2021-11-12 23:15:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 23:15:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-12 23:15:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 468 states have (on average 1.6688034188034189) internal successors, (781), 489 states have internal predecessors, (781), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 992 transitions. [2021-11-12 23:15:16,831 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 992 transitions. Word has length 85 [2021-11-12 23:15:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:16,833 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 992 transitions. [2021-11-12 23:15:16,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 992 transitions. [2021-11-12 23:15:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:15:16,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:16,837 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:16,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:17,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:17,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1863267408, now seen corresponding path program 1 times [2021-11-12 23:15:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:17,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170301821] [2021-11-12 23:15:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:17,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:17,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:17,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:17,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:15:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:15:17,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:15:18,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:18,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170301821] [2021-11-12 23:15:18,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170301821] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:18,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:18,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:18,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226349431] [2021-11-12 23:15:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:18,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:18,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:18,300 INFO L87 Difference]: Start difference. First operand 604 states and 992 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:18,428 INFO L93 Difference]: Finished difference Result 1199 states and 1976 transitions. [2021-11-12 23:15:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-12 23:15:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:18,438 INFO L225 Difference]: With dead ends: 1199 [2021-11-12 23:15:18,439 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 23:15:18,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:18,447 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 12 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:18,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2930 Invalid, 33 Unknown, 0 Unchecked, 17.33ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 45.79ms Time] [2021-11-12 23:15:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 23:15:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-12 23:15:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 468 states have (on average 1.6666666666666667) internal successors, (780), 489 states have internal predecessors, (780), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 991 transitions. [2021-11-12 23:15:18,514 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 991 transitions. Word has length 87 [2021-11-12 23:15:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:18,514 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 991 transitions. [2021-11-12 23:15:18,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 991 transitions. [2021-11-12 23:15:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:15:18,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:18,519 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:18,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:18,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:18,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:18,735 INFO L85 PathProgramCache]: Analyzing trace with hash 572926040, now seen corresponding path program 1 times [2021-11-12 23:15:18,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:18,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77046530] [2021-11-12 23:15:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:18,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:18,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:18,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:18,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:15:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:15:19,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:15:19,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:19,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77046530] [2021-11-12 23:15:19,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77046530] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:19,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:19,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:19,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630334967] [2021-11-12 23:15:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:19,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:19,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:19,822 INFO L87 Difference]: Start difference. First operand 604 states and 991 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:19,938 INFO L93 Difference]: Finished difference Result 1203 states and 1979 transitions. [2021-11-12 23:15:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-12 23:15:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:19,945 INFO L225 Difference]: With dead ends: 1203 [2021-11-12 23:15:19,945 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 23:15:19,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:19,959 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 13 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:19,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2930 Invalid, 35 Unknown, 0 Unchecked, 8.56ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 48.64ms Time] [2021-11-12 23:15:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 23:15:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-12 23:15:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 473 states have (on average 1.6596194503171247) internal successors, (785), 494 states have internal predecessors, (785), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 996 transitions. [2021-11-12 23:15:19,998 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 996 transitions. Word has length 89 [2021-11-12 23:15:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:19,998 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 996 transitions. [2021-11-12 23:15:19,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 996 transitions. [2021-11-12 23:15:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 23:15:20,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:20,002 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:20,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 23:15:20,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:20,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 483938580, now seen corresponding path program 1 times [2021-11-12 23:15:20,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:20,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725747579] [2021-11-12 23:15:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:20,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:20,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:20,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:15:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:15:21,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:15:21,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:21,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725747579] [2021-11-12 23:15:21,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725747579] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:21,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:21,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:21,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847562367] [2021-11-12 23:15:21,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:21,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:21,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:21,436 INFO L87 Difference]: Start difference. First operand 610 states and 996 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:21,525 INFO L93 Difference]: Finished difference Result 1202 states and 1970 transitions. [2021-11-12 23:15:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-12 23:15:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:21,532 INFO L225 Difference]: With dead ends: 1202 [2021-11-12 23:15:21,532 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 23:15:21,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:21,537 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 8 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:21,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2931 Invalid, 30 Unknown, 0 Unchecked, 6.94ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 35.65ms Time] [2021-11-12 23:15:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 23:15:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-12 23:15:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 473 states have (on average 1.657505285412262) internal successors, (784), 494 states have internal predecessors, (784), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 995 transitions. [2021-11-12 23:15:21,567 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 995 transitions. Word has length 90 [2021-11-12 23:15:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:21,568 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 995 transitions. [2021-11-12 23:15:21,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 995 transitions. [2021-11-12 23:15:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:15:21,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:21,570 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:21,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:21,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:21,793 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:21,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1193536220, now seen corresponding path program 1 times [2021-11-12 23:15:21,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:21,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918242527] [2021-11-12 23:15:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:21,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:21,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:21,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:15:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:22,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:15:22,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:15:22,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:22,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918242527] [2021-11-12 23:15:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918242527] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:22,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:22,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:22,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020696382] [2021-11-12 23:15:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:22,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:22,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:22,963 INFO L87 Difference]: Start difference. First operand 610 states and 995 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:23,060 INFO L93 Difference]: Finished difference Result 1202 states and 1969 transitions. [2021-11-12 23:15:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-12 23:15:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:23,075 INFO L225 Difference]: With dead ends: 1202 [2021-11-12 23:15:23,076 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 23:15:23,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:23,082 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 6 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2931 Invalid, 28 Unknown, 0 Unchecked, 7.82ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 36.16ms Time] [2021-11-12 23:15:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 23:15:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-12 23:15:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 473 states have (on average 1.6553911205073997) internal successors, (783), 494 states have internal predecessors, (783), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 994 transitions. [2021-11-12 23:15:23,117 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 994 transitions. Word has length 91 [2021-11-12 23:15:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:23,117 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 994 transitions. [2021-11-12 23:15:23,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 994 transitions. [2021-11-12 23:15:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:15:23,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:23,121 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:23,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:23,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 889468184, now seen corresponding path program 1 times [2021-11-12 23:15:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:23,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145641608] [2021-11-12 23:15:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:23,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:23,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:23,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:15:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:24,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:24,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145641608] [2021-11-12 23:15:24,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145641608] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:24,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:24,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:15:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330603300] [2021-11-12 23:15:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:15:24,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:15:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:15:24,603 INFO L87 Difference]: Start difference. First operand 610 states and 994 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:24,888 INFO L93 Difference]: Finished difference Result 1219 states and 1997 transitions. [2021-11-12 23:15:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-12 23:15:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:24,896 INFO L225 Difference]: With dead ends: 1219 [2021-11-12 23:15:24,897 INFO L226 Difference]: Without dead ends: 631 [2021-11-12 23:15:24,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:15:24,902 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 148 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:24,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5761 Invalid, 85 Unknown, 0 Unchecked, 14.12ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 207.55ms Time] [2021-11-12 23:15:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-12 23:15:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-12 23:15:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 489 states have (on average 1.6543967280163598) internal successors, (809), 512 states have internal predecessors, (809), 109 states have call successors, (109), 29 states have call predecessors, (109), 30 states have return successors, (107), 101 states have call predecessors, (107), 104 states have call successors, (107) [2021-11-12 23:15:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1025 transitions. [2021-11-12 23:15:24,938 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1025 transitions. Word has length 92 [2021-11-12 23:15:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:24,938 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1025 transitions. [2021-11-12 23:15:24,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1025 transitions. [2021-11-12 23:15:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:15:24,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:24,942 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:24,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:25,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:25,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1756520409, now seen corresponding path program 1 times [2021-11-12 23:15:25,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:25,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068809193] [2021-11-12 23:15:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:25,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:25,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:25,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:15:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:25,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:15:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:15:26,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:26,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068809193] [2021-11-12 23:15:26,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068809193] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:26,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:26,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:15:26,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475271646] [2021-11-12 23:15:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:26,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:26,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:15:26,353 INFO L87 Difference]: Start difference. First operand 629 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:26,448 INFO L93 Difference]: Finished difference Result 1232 states and 2019 transitions. [2021-11-12 23:15:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-12 23:15:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:26,456 INFO L225 Difference]: With dead ends: 1232 [2021-11-12 23:15:26,456 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:15:26,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:26,462 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 8 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:26,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2930 Invalid, 30 Unknown, 0 Unchecked, 7.32ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 39.84ms Time] [2021-11-12 23:15:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:15:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2021-11-12 23:15:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 487 states have (on average 1.6550308008213552) internal successors, (806), 509 states have internal predecessors, (806), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2021-11-12 23:15:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1018 transitions. [2021-11-12 23:15:26,494 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1018 transitions. Word has length 92 [2021-11-12 23:15:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:26,494 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1018 transitions. [2021-11-12 23:15:26,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1018 transitions. [2021-11-12 23:15:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:15:26,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:26,497 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:26,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:26,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash 162738395, now seen corresponding path program 1 times [2021-11-12 23:15:26,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:26,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629489920] [2021-11-12 23:15:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:26,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:15:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:27,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:15:27,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:27,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629489920] [2021-11-12 23:15:27,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629489920] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:27,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:27,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:27,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717652805] [2021-11-12 23:15:27,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:27,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:27,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:27,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:27,874 INFO L87 Difference]: Start difference. First operand 625 states and 1018 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:28,121 INFO L93 Difference]: Finished difference Result 1258 states and 2064 transitions. [2021-11-12 23:15:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:28,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-12 23:15:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:28,130 INFO L225 Difference]: With dead ends: 1258 [2021-11-12 23:15:28,130 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:15:28,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:28,135 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 134 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.46ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:28,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2738 Invalid, 131 Unknown, 0 Unchecked, 7.46ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 192.17ms Time] [2021-11-12 23:15:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:15:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2021-11-12 23:15:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 487 states have (on average 1.6447638603696098) internal successors, (801), 509 states have internal predecessors, (801), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2021-11-12 23:15:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1013 transitions. [2021-11-12 23:15:28,168 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1013 transitions. Word has length 93 [2021-11-12 23:15:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:28,169 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1013 transitions. [2021-11-12 23:15:28,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1013 transitions. [2021-11-12 23:15:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:15:28,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:28,172 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:28,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:28,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:28,386 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1005788359, now seen corresponding path program 1 times [2021-11-12 23:15:28,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:28,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772065729] [2021-11-12 23:15:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:28,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:28,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:28,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:28,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:15:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:29,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:15:29,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:29,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772065729] [2021-11-12 23:15:29,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772065729] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:29,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:29,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:29,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310062255] [2021-11-12 23:15:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:29,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:29,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:29,648 INFO L87 Difference]: Start difference. First operand 625 states and 1013 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:29,905 INFO L93 Difference]: Finished difference Result 1258 states and 2054 transitions. [2021-11-12 23:15:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-12 23:15:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:29,915 INFO L225 Difference]: With dead ends: 1258 [2021-11-12 23:15:29,915 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:15:29,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:29,920 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 128 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.13ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:29,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2738 Invalid, 121 Unknown, 0 Unchecked, 8.13ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 199.22ms Time] [2021-11-12 23:15:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:15:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2021-11-12 23:15:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 487 states have (on average 1.6344969199178645) internal successors, (796), 509 states have internal predecessors, (796), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2021-11-12 23:15:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1008 transitions. [2021-11-12 23:15:29,952 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1008 transitions. Word has length 95 [2021-11-12 23:15:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:29,953 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1008 transitions. [2021-11-12 23:15:29,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1008 transitions. [2021-11-12 23:15:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:15:29,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:29,956 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:29,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:30,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:30,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash 813779643, now seen corresponding path program 1 times [2021-11-12 23:15:30,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:30,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000602934] [2021-11-12 23:15:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:30,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:30,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:30,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:30,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:15:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:30,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:30,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:30,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:15:31,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:31,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000602934] [2021-11-12 23:15:31,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000602934] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:31,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:31,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:31,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6105349] [2021-11-12 23:15:31,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:31,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:31,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:31,196 INFO L87 Difference]: Start difference. First operand 625 states and 1008 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:31,416 INFO L93 Difference]: Finished difference Result 1279 states and 2075 transitions. [2021-11-12 23:15:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-12 23:15:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:31,424 INFO L225 Difference]: With dead ends: 1279 [2021-11-12 23:15:31,425 INFO L226 Difference]: Without dead ends: 655 [2021-11-12 23:15:31,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:31,431 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 143 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.39ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 169.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:31,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2748 Invalid, 131 Unknown, 0 Unchecked, 6.39ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 169.61ms Time] [2021-11-12 23:15:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-12 23:15:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 640. [2021-11-12 23:15:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 502 states have (on average 1.6155378486055776) internal successors, (811), 523 states have internal predecessors, (811), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1022 transitions. [2021-11-12 23:15:31,464 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1022 transitions. Word has length 97 [2021-11-12 23:15:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:31,464 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1022 transitions. [2021-11-12 23:15:31,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1022 transitions. [2021-11-12 23:15:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:15:31,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:31,467 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:31,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:31,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:31,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash 689905211, now seen corresponding path program 1 times [2021-11-12 23:15:31,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:31,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660265277] [2021-11-12 23:15:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:31,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:31,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:31,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:31,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:15:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:32,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:32,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:32,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660265277] [2021-11-12 23:15:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660265277] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:32,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:32,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:15:32,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643952920] [2021-11-12 23:15:32,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:32,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:15:32,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:15:32,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:15:32,848 INFO L87 Difference]: Start difference. First operand 640 states and 1022 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:33,031 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-12 23:15:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:33,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-12 23:15:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:33,039 INFO L225 Difference]: With dead ends: 1243 [2021-11-12 23:15:33,039 INFO L226 Difference]: Without dead ends: 634 [2021-11-12 23:15:33,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:15:33,043 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 131 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5729 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5729 Invalid, 75 Unknown, 0 Unchecked, 9.82ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 118.08ms Time] [2021-11-12 23:15:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-12 23:15:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 619. [2021-11-12 23:15:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 481 states have (on average 1.6091476091476091) internal successors, (774), 502 states have internal predecessors, (774), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 985 transitions. [2021-11-12 23:15:33,067 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 985 transitions. Word has length 97 [2021-11-12 23:15:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:33,067 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 985 transitions. [2021-11-12 23:15:33,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 985 transitions. [2021-11-12 23:15:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:15:33,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:33,070 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:33,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:33,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:33,290 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:33,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1248396917, now seen corresponding path program 1 times [2021-11-12 23:15:33,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:33,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211070925] [2021-11-12 23:15:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:33,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:33,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:33,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:15:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:33,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:15:34,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:34,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211070925] [2021-11-12 23:15:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211070925] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:34,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:34,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:34,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654159377] [2021-11-12 23:15:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:34,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:34,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:34,245 INFO L87 Difference]: Start difference. First operand 619 states and 985 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:34,376 INFO L93 Difference]: Finished difference Result 1207 states and 1934 transitions. [2021-11-12 23:15:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:34,378 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-12 23:15:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:34,383 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 23:15:34,383 INFO L226 Difference]: Without dead ends: 619 [2021-11-12 23:15:34,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:34,388 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 69 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:34,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2762 Invalid, 54 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 92.46ms Time] [2021-11-12 23:15:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-12 23:15:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-11-12 23:15:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 481 states have (on average 1.607068607068607) internal successors, (773), 502 states have internal predecessors, (773), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 984 transitions. [2021-11-12 23:15:34,414 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 984 transitions. Word has length 98 [2021-11-12 23:15:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:34,415 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 984 transitions. [2021-11-12 23:15:34,415 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 984 transitions. [2021-11-12 23:15:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:15:34,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:34,417 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:34,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:34,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:34,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1982159594, now seen corresponding path program 1 times [2021-11-12 23:15:34,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:34,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744030955] [2021-11-12 23:15:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:34,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:34,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:34,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:15:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:35,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:15:35,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:35,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744030955] [2021-11-12 23:15:35,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744030955] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:35,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:35,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:15:35,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388574031] [2021-11-12 23:15:35,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:35,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:35,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:35,671 INFO L87 Difference]: Start difference. First operand 619 states and 984 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:35,792 INFO L93 Difference]: Finished difference Result 1207 states and 1933 transitions. [2021-11-12 23:15:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-12 23:15:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:35,798 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 23:15:35,799 INFO L226 Difference]: Without dead ends: 619 [2021-11-12 23:15:35,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:15:35,802 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 67 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:35,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2762 Invalid, 52 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 83.29ms Time] [2021-11-12 23:15:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-12 23:15:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-11-12 23:15:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 481 states have (on average 1.604989604989605) internal successors, (772), 502 states have internal predecessors, (772), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 983 transitions. [2021-11-12 23:15:35,829 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 983 transitions. Word has length 99 [2021-11-12 23:15:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:35,830 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 983 transitions. [2021-11-12 23:15:35,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:15:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 983 transitions. [2021-11-12 23:15:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:15:35,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:35,832 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:35,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:36,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:36,053 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1425980848, now seen corresponding path program 1 times [2021-11-12 23:15:36,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:36,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913853409] [2021-11-12 23:15:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:36,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:36,056 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:36,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:15:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:36,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:15:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:36,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:37,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:37,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913853409] [2021-11-12 23:15:37,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913853409] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:37,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:37,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:15:37,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187119289] [2021-11-12 23:15:37,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:37,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:15:37,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:15:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:37,358 INFO L87 Difference]: Start difference. First operand 619 states and 983 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:37,612 INFO L93 Difference]: Finished difference Result 1212 states and 1940 transitions. [2021-11-12 23:15:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:15:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-12 23:15:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:37,618 INFO L225 Difference]: With dead ends: 1212 [2021-11-12 23:15:37,619 INFO L226 Difference]: Without dead ends: 630 [2021-11-12 23:15:37,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:15:37,623 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 109 mSDsluCounter, 5486 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6411 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:37,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6411 Invalid, 152 Unknown, 0 Unchecked, 9.48ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 170.40ms Time] [2021-11-12 23:15:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-12 23:15:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 621. [2021-11-12 23:15:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 483 states have (on average 1.6004140786749483) internal successors, (773), 504 states have internal predecessors, (773), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 984 transitions. [2021-11-12 23:15:37,646 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 984 transitions. Word has length 100 [2021-11-12 23:15:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:37,646 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 984 transitions. [2021-11-12 23:15:37,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 984 transitions. [2021-11-12 23:15:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:15:37,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:37,649 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:37,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:37,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:37,864 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2039444641, now seen corresponding path program 1 times [2021-11-12 23:15:37,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:37,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551836543] [2021-11-12 23:15:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:37,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:37,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:37,866 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:15:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:15:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:38,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:39,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:39,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551836543] [2021-11-12 23:15:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551836543] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:15:39,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:15:39,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:15:39,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597040676] [2021-11-12 23:15:39,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:39,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:15:39,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:15:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:39,049 INFO L87 Difference]: Start difference. First operand 621 states and 984 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:39,356 INFO L93 Difference]: Finished difference Result 1204 states and 1921 transitions. [2021-11-12 23:15:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:15:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-12 23:15:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:39,362 INFO L225 Difference]: With dead ends: 1204 [2021-11-12 23:15:39,363 INFO L226 Difference]: Without dead ends: 626 [2021-11-12 23:15:39,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:15:39,367 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 77 mSDsluCounter, 5492 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6419 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:39,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6419 Invalid, 152 Unknown, 0 Unchecked, 8.37ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 198.65ms Time] [2021-11-12 23:15:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-12 23:15:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 623. [2021-11-12 23:15:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 485 states have (on average 1.595876288659794) internal successors, (774), 506 states have internal predecessors, (774), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 985 transitions. [2021-11-12 23:15:39,394 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 985 transitions. Word has length 101 [2021-11-12 23:15:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 985 transitions. [2021-11-12 23:15:39,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:15:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 985 transitions. [2021-11-12 23:15:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:15:39,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:39,397 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:39,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:39,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:39,618 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1698740326, now seen corresponding path program 1 times [2021-11-12 23:15:39,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:39,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619088264] [2021-11-12 23:15:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:39,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:39,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:39,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:39,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:15:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:40,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:40,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:40,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619088264] [2021-11-12 23:15:40,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619088264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:40,730 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:40,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:15:40,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492989624] [2021-11-12 23:15:40,731 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:40,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:15:40,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:40,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:15:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:15:40,733 INFO L87 Difference]: Start difference. First operand 623 states and 985 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:40,949 INFO L93 Difference]: Finished difference Result 1150 states and 1848 transitions. [2021-11-12 23:15:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:15:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-12 23:15:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:40,956 INFO L225 Difference]: With dead ends: 1150 [2021-11-12 23:15:40,956 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:15:40,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:15:40,961 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 110 mSDsluCounter, 4678 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5617 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.06ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:40,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5617 Invalid, 93 Unknown, 0 Unchecked, 8.06ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 154.54ms Time] [2021-11-12 23:15:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:15:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-12 23:15:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 478 states have (on average 1.602510460251046) internal successors, (766), 499 states have internal predecessors, (766), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 977 transitions. [2021-11-12 23:15:40,987 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 977 transitions. Word has length 102 [2021-11-12 23:15:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:40,988 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 977 transitions. [2021-11-12 23:15:40,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 977 transitions. [2021-11-12 23:15:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:15:40,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:40,990 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:41,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:41,223 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash -937103009, now seen corresponding path program 1 times [2021-11-12 23:15:41,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:41,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459851830] [2021-11-12 23:15:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:41,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:41,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:41,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:41,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:15:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:42,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:42,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:42,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459851830] [2021-11-12 23:15:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459851830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:42,406 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:42,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:15:42,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145064035] [2021-11-12 23:15:42,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:42,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:15:42,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:15:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:15:42,408 INFO L87 Difference]: Start difference. First operand 616 states and 977 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:42,628 INFO L93 Difference]: Finished difference Result 1155 states and 1862 transitions. [2021-11-12 23:15:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-12 23:15:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:42,636 INFO L225 Difference]: With dead ends: 1155 [2021-11-12 23:15:42,636 INFO L226 Difference]: Without dead ends: 613 [2021-11-12 23:15:42,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:15:42,640 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 98 mSDsluCounter, 5484 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:42,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 6415 Invalid, 78 Unknown, 0 Unchecked, 8.13ms Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 160.04ms Time] [2021-11-12 23:15:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-12 23:15:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2021-11-12 23:15:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 475 states have (on average 1.6021052631578947) internal successors, (761), 496 states have internal predecessors, (761), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 972 transitions. [2021-11-12 23:15:42,667 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 972 transitions. Word has length 103 [2021-11-12 23:15:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:42,667 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 972 transitions. [2021-11-12 23:15:42,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 972 transitions. [2021-11-12 23:15:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:15:42,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:42,670 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:42,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:42,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:42,894 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1114886689, now seen corresponding path program 1 times [2021-11-12 23:15:42,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:42,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731565562] [2021-11-12 23:15:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:42,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:42,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:42,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:15:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:43,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:43,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:43,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:43,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731565562] [2021-11-12 23:15:43,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731565562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:43,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:43,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:15:43,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646926516] [2021-11-12 23:15:43,994 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:43,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:15:43,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:15:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:15:43,998 INFO L87 Difference]: Start difference. First operand 613 states and 972 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:15:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:44,205 INFO L93 Difference]: Finished difference Result 1152 states and 1857 transitions. [2021-11-12 23:15:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-12 23:15:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:44,244 INFO L225 Difference]: With dead ends: 1152 [2021-11-12 23:15:44,244 INFO L226 Difference]: Without dead ends: 605 [2021-11-12 23:15:44,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:15:44,249 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 105 mSDsluCounter, 5475 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6405 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:44,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6405 Invalid, 73 Unknown, 0 Unchecked, 9.69ms Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 149.01ms Time] [2021-11-12 23:15:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-12 23:15:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-12 23:15:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 467 states have (on average 1.6059957173447537) internal successors, (750), 488 states have internal predecessors, (750), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 961 transitions. [2021-11-12 23:15:44,276 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 961 transitions. Word has length 103 [2021-11-12 23:15:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:44,276 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 961 transitions. [2021-11-12 23:15:44,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:15:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 961 transitions. [2021-11-12 23:15:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:15:44,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:44,279 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:44,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:44,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:44,502 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 101702238, now seen corresponding path program 1 times [2021-11-12 23:15:44,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:44,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567781073] [2021-11-12 23:15:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:44,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:44,504 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:44,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:15:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:15:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:45,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:45,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:45,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567781073] [2021-11-12 23:15:45,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567781073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:45,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:45,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:15:45,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711006675] [2021-11-12 23:15:45,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:45,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:15:45,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:15:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:45,736 INFO L87 Difference]: Start difference. First operand 605 states and 961 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:45,942 INFO L93 Difference]: Finished difference Result 1138 states and 1835 transitions. [2021-11-12 23:15:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:15:45,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-12 23:15:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:45,949 INFO L225 Difference]: With dead ends: 1138 [2021-11-12 23:15:45,949 INFO L226 Difference]: Without dead ends: 605 [2021-11-12 23:15:45,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:15:45,953 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 101 mSDsluCounter, 7318 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 8244 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.19ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:45,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 8244 Invalid, 145 Unknown, 0 Unchecked, 8.19ms Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 146.56ms Time] [2021-11-12 23:15:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-12 23:15:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-12 23:15:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 467 states have (on average 1.6038543897216273) internal successors, (749), 488 states have internal predecessors, (749), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 960 transitions. [2021-11-12 23:15:45,978 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 960 transitions. Word has length 104 [2021-11-12 23:15:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:45,978 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 960 transitions. [2021-11-12 23:15:45,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 960 transitions. [2021-11-12 23:15:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:15:45,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:45,980 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:46,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:46,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:46,202 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:46,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2097914435, now seen corresponding path program 1 times [2021-11-12 23:15:46,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:46,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814004149] [2021-11-12 23:15:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:46,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:46,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:46,204 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:46,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:15:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:15:46,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:46,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:47,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:47,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814004149] [2021-11-12 23:15:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814004149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:47,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:15:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371873891] [2021-11-12 23:15:47,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:47,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:15:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:15:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:47,575 INFO L87 Difference]: Start difference. First operand 605 states and 960 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:47,842 INFO L93 Difference]: Finished difference Result 1182 states and 1892 transitions. [2021-11-12 23:15:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:15:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-12 23:15:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:47,850 INFO L225 Difference]: With dead ends: 1182 [2021-11-12 23:15:47,850 INFO L226 Difference]: Without dead ends: 602 [2021-11-12 23:15:47,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:15:47,855 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 144 mSDsluCounter, 5424 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6338 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:47,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6338 Invalid, 101 Unknown, 0 Unchecked, 9.03ms Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 164.95ms Time] [2021-11-12 23:15:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-12 23:15:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-12 23:15:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 464 states have (on average 1.5969827586206897) internal successors, (741), 485 states have internal predecessors, (741), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 952 transitions. [2021-11-12 23:15:47,885 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 952 transitions. Word has length 105 [2021-11-12 23:15:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:47,885 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 952 transitions. [2021-11-12 23:15:47,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 952 transitions. [2021-11-12 23:15:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:15:47,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:47,888 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:47,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:48,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:48,113 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:48,113 INFO L85 PathProgramCache]: Analyzing trace with hash 484929539, now seen corresponding path program 1 times [2021-11-12 23:15:48,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:48,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769527393] [2021-11-12 23:15:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:48,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:48,115 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:48,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:15:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:15:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:49,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:49,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:49,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769527393] [2021-11-12 23:15:49,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769527393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:49,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:49,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:15:49,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019110752] [2021-11-12 23:15:49,443 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:49,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:15:49,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:15:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:49,445 INFO L87 Difference]: Start difference. First operand 602 states and 952 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:49,698 INFO L93 Difference]: Finished difference Result 1129 states and 1815 transitions. [2021-11-12 23:15:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:15:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-12 23:15:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:49,706 INFO L225 Difference]: With dead ends: 1129 [2021-11-12 23:15:49,706 INFO L226 Difference]: Without dead ends: 602 [2021-11-12 23:15:49,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:15:49,712 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 100 mSDsluCounter, 5452 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6367 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:49,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6367 Invalid, 117 Unknown, 0 Unchecked, 9.10ms Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 146.91ms Time] [2021-11-12 23:15:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-12 23:15:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-12 23:15:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 464 states have (on average 1.5948275862068966) internal successors, (740), 485 states have internal predecessors, (740), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 951 transitions. [2021-11-12 23:15:49,742 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 951 transitions. Word has length 106 [2021-11-12 23:15:49,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:49,742 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 951 transitions. [2021-11-12 23:15:49,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 951 transitions. [2021-11-12 23:15:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:15:49,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:49,745 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:49,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:49,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:49,969 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1905380946, now seen corresponding path program 1 times [2021-11-12 23:15:49,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:49,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120068598] [2021-11-12 23:15:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:49,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:49,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:49,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:15:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:15:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:15:51,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:51,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120068598] [2021-11-12 23:15:51,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120068598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:51,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:51,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:15:51,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193537221] [2021-11-12 23:15:51,330 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:51,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:15:51,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:15:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:51,332 INFO L87 Difference]: Start difference. First operand 602 states and 951 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:51,602 INFO L93 Difference]: Finished difference Result 1167 states and 1860 transitions. [2021-11-12 23:15:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:15:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-12 23:15:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:51,612 INFO L225 Difference]: With dead ends: 1167 [2021-11-12 23:15:51,612 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:15:51,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:15:51,617 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 76 mSDsluCounter, 8133 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 9046 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.62ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:51,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 9046 Invalid, 142 Unknown, 0 Unchecked, 8.62ms Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 187.82ms Time] [2021-11-12 23:15:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:15:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-12 23:15:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 461 states have (on average 1.5878524945770065) internal successors, (732), 482 states have internal predecessors, (732), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:15:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 943 transitions. [2021-11-12 23:15:51,668 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 943 transitions. Word has length 107 [2021-11-12 23:15:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:51,668 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 943 transitions. [2021-11-12 23:15:51,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:15:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 943 transitions. [2021-11-12 23:15:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:15:51,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:51,674 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:15:51,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:51,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:51,890 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash 216038504, now seen corresponding path program 1 times [2021-11-12 23:15:51,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:51,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735848061] [2021-11-12 23:15:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:51,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:51,892 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:51,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:15:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:15:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:15:53,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:15:53,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:53,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735848061] [2021-11-12 23:15:53,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735848061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:53,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:53,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 23:15:53,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575521528] [2021-11-12 23:15:53,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:53,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:15:53,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:15:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:15:53,672 INFO L87 Difference]: Start difference. First operand 599 states and 943 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 23:15:55,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:57,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:59,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:01,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:11,684 INFO L93 Difference]: Finished difference Result 2875 states and 4726 transitions. [2021-11-12 23:16:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:16:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-12 23:16:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:11,711 INFO L225 Difference]: With dead ends: 2875 [2021-11-12 23:16:11,711 INFO L226 Difference]: Without dead ends: 2356 [2021-11-12 23:16:11,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:16:11,716 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6170 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 5690 mSolverCounterSat, 1765 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16285.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6367 SdHoareTripleChecker+Valid, 3909 SdHoareTripleChecker+Invalid, 7459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.68ms SdHoareTripleChecker+Time, 1765 IncrementalHoareTripleChecker+Valid, 5690 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17625.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:11,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6367 Valid, 3909 Invalid, 7459 Unknown, 0 Unchecked, 52.68ms Time], IncrementalHoareTripleChecker [1765 Valid, 5690 Invalid, 4 Unknown, 0 Unchecked, 17625.34ms Time] [2021-11-12 23:16:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-11-12 23:16:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2174. [2021-11-12 23:16:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1659 states have (on average 1.6401446654611211) internal successors, (2721), 1724 states have internal predecessors, (2721), 422 states have call successors, (422), 89 states have call predecessors, (422), 92 states have return successors, (430), 387 states have call predecessors, (430), 417 states have call successors, (430) [2021-11-12 23:16:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3573 transitions. [2021-11-12 23:16:11,857 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3573 transitions. Word has length 108 [2021-11-12 23:16:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:11,857 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 3573 transitions. [2021-11-12 23:16:11,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 23:16:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3573 transitions. [2021-11-12 23:16:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:16:11,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:11,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:12,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:12,078 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2122326494, now seen corresponding path program 1 times [2021-11-12 23:16:12,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:12,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650291601] [2021-11-12 23:16:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:12,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:12,080 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:12,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:16:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:16:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:13,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:13,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:13,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650291601] [2021-11-12 23:16:13,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650291601] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:16:13,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:16:13,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:16:13,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263194285] [2021-11-12 23:16:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:13,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:16:13,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:16:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:16:13,864 INFO L87 Difference]: Start difference. First operand 2174 states and 3573 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:15,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:17,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:18,947 INFO L93 Difference]: Finished difference Result 4284 states and 7191 transitions. [2021-11-12 23:16:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:16:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 163 [2021-11-12 23:16:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:18,970 INFO L225 Difference]: With dead ends: 4284 [2021-11-12 23:16:18,970 INFO L226 Difference]: Without dead ends: 2190 [2021-11-12 23:16:18,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:16:18,989 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 847 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4812.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4953.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2307 Invalid, 485 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [16 Valid, 467 Invalid, 2 Unknown, 0 Unchecked, 4953.68ms Time] [2021-11-12 23:16:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-11-12 23:16:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 2190. [2021-11-12 23:16:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 1671 states have (on average 1.6355475763016158) internal successors, (2733), 1736 states have internal predecessors, (2733), 422 states have call successors, (422), 93 states have call predecessors, (422), 96 states have return successors, (434), 387 states have call predecessors, (434), 417 states have call successors, (434) [2021-11-12 23:16:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3589 transitions. [2021-11-12 23:16:19,182 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3589 transitions. Word has length 163 [2021-11-12 23:16:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:19,182 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 3589 transitions. [2021-11-12 23:16:19,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3589 transitions. [2021-11-12 23:16:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-12 23:16:19,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:19,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:19,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:19,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:19,415 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1716344167, now seen corresponding path program 1 times [2021-11-12 23:16:19,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:19,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774942608] [2021-11-12 23:16:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:19,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:19,417 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:19,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:16:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:16:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:16:20,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:16:21,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:21,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774942608] [2021-11-12 23:16:21,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774942608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:21,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:21,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:16:21,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092081397] [2021-11-12 23:16:21,126 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:21,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:16:21,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:16:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:16:21,128 INFO L87 Difference]: Start difference. First operand 2190 states and 3589 transitions. Second operand has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 11 states have internal predecessors, (157), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 23:16:23,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:25,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:35,226 INFO L93 Difference]: Finished difference Result 5768 states and 9480 transitions. [2021-11-12 23:16:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:16:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 11 states have internal predecessors, (157), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) Word has length 164 [2021-11-12 23:16:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:35,254 INFO L225 Difference]: With dead ends: 5768 [2021-11-12 23:16:35,254 INFO L226 Difference]: Without dead ends: 3658 [2021-11-12 23:16:35,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:16:35,268 INFO L933 BasicCegarLoop]: 1889 mSDtfsCounter, 4220 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 7247 mSolverCounterSat, 1655 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12133.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4313 SdHoareTripleChecker+Valid, 4963 SdHoareTripleChecker+Invalid, 8904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.51ms SdHoareTripleChecker+Time, 1655 IncrementalHoareTripleChecker+Valid, 7247 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13431.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:35,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4313 Valid, 4963 Invalid, 8904 Unknown, 0 Unchecked, 52.51ms Time], IncrementalHoareTripleChecker [1655 Valid, 7247 Invalid, 2 Unknown, 0 Unchecked, 13431.27ms Time] [2021-11-12 23:16:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-11-12 23:16:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3192. [2021-11-12 23:16:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3192 states, 2379 states have (on average 1.596469104665826) internal successors, (3798), 2470 states have internal predecessors, (3798), 660 states have call successors, (660), 136 states have call predecessors, (660), 152 states have return successors, (702), 618 states have call predecessors, (702), 655 states have call successors, (702) [2021-11-12 23:16:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 5160 transitions. [2021-11-12 23:16:35,503 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 5160 transitions. Word has length 164 [2021-11-12 23:16:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:35,503 INFO L470 AbstractCegarLoop]: Abstraction has 3192 states and 5160 transitions. [2021-11-12 23:16:35,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 11 states have internal predecessors, (157), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 23:16:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 5160 transitions. [2021-11-12 23:16:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:16:35,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:35,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:35,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:35,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:35,726 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:35,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:35,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1707718100, now seen corresponding path program 1 times [2021-11-12 23:16:35,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:35,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627303966] [2021-11-12 23:16:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:35,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:35,728 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:35,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:16:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:16:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:36,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:37,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:37,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627303966] [2021-11-12 23:16:37,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627303966] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:16:37,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:16:37,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:16:37,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235436423] [2021-11-12 23:16:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:37,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:16:37,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:16:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:16:37,456 INFO L87 Difference]: Start difference. First operand 3192 states and 5160 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:39,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:41,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:42,676 INFO L93 Difference]: Finished difference Result 6354 states and 10479 transitions. [2021-11-12 23:16:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:16:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 165 [2021-11-12 23:16:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:42,717 INFO L225 Difference]: With dead ends: 6354 [2021-11-12 23:16:42,717 INFO L226 Difference]: Without dead ends: 3242 [2021-11-12 23:16:42,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:16:42,783 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 848 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4884.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5020.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:42,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2308 Invalid, 487 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [14 Valid, 471 Invalid, 2 Unknown, 0 Unchecked, 5020.09ms Time] [2021-11-12 23:16:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-11-12 23:16:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3242. [2021-11-12 23:16:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 2419 states have (on average 1.586606035551881) internal successors, (3838), 2510 states have internal predecessors, (3838), 660 states have call successors, (660), 146 states have call predecessors, (660), 162 states have return successors, (708), 618 states have call predecessors, (708), 655 states have call successors, (708) [2021-11-12 23:16:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 5206 transitions. [2021-11-12 23:16:43,001 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 5206 transitions. Word has length 165 [2021-11-12 23:16:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:43,001 INFO L470 AbstractCegarLoop]: Abstraction has 3242 states and 5206 transitions. [2021-11-12 23:16:43,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 5206 transitions. [2021-11-12 23:16:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-12 23:16:43,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:43,009 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] [2021-11-12 23:16:43,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:43,228 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 934682654, now seen corresponding path program 1 times [2021-11-12 23:16:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:43,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794478210] [2021-11-12 23:16:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:43,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:43,231 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:43,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:16:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:16:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:44,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:44,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:44,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794478210] [2021-11-12 23:16:44,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794478210] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:16:44,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:16:44,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:16:44,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992432255] [2021-11-12 23:16:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:44,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:16:44,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:44,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:16:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:16:44,886 INFO L87 Difference]: Start difference. First operand 3242 states and 5206 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:46,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:48,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:50,018 INFO L93 Difference]: Finished difference Result 6464 states and 10571 transitions. [2021-11-12 23:16:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:16:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 167 [2021-11-12 23:16:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:50,039 INFO L225 Difference]: With dead ends: 6464 [2021-11-12 23:16:50,039 INFO L226 Difference]: Without dead ends: 3302 [2021-11-12 23:16:50,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:16:50,053 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 848 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4824.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.07ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4969.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:50,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2308 Invalid, 486 Unknown, 0 Unchecked, 6.07ms Time], IncrementalHoareTripleChecker [12 Valid, 472 Invalid, 2 Unknown, 0 Unchecked, 4969.65ms Time] [2021-11-12 23:16:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-11-12 23:16:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 3302. [2021-11-12 23:16:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 2469 states have (on average 1.574726609963548) internal successors, (3888), 2560 states have internal predecessors, (3888), 660 states have call successors, (660), 156 states have call predecessors, (660), 172 states have return successors, (714), 618 states have call predecessors, (714), 655 states have call successors, (714) [2021-11-12 23:16:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 5262 transitions. [2021-11-12 23:16:50,295 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 5262 transitions. Word has length 167 [2021-11-12 23:16:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:50,301 INFO L470 AbstractCegarLoop]: Abstraction has 3302 states and 5262 transitions. [2021-11-12 23:16:50,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 5262 transitions. [2021-11-12 23:16:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 23:16:50,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:50,308 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, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:50,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:50,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:50,535 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:50,535 INFO L85 PathProgramCache]: Analyzing trace with hash -916400116, now seen corresponding path program 1 times [2021-11-12 23:16:50,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:50,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330144833] [2021-11-12 23:16:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:50,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:50,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:50,537 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:50,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:16:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:16:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:51,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:16:52,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:52,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330144833] [2021-11-12 23:16:52,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330144833] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:16:52,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:16:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:16:52,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941401231] [2021-11-12 23:16:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:52,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:16:52,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:16:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:16:52,182 INFO L87 Difference]: Start difference. First operand 3302 states and 5262 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:54,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:56,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:57,156 INFO L93 Difference]: Finished difference Result 6594 states and 10683 transitions. [2021-11-12 23:16:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:16:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2021-11-12 23:16:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:57,175 INFO L225 Difference]: With dead ends: 6594 [2021-11-12 23:16:57,175 INFO L226 Difference]: Without dead ends: 3372 [2021-11-12 23:16:57,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:16:57,191 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 848 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4711.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.23ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4831.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:57,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2308 Invalid, 485 Unknown, 0 Unchecked, 5.23ms Time], IncrementalHoareTripleChecker [10 Valid, 473 Invalid, 2 Unknown, 0 Unchecked, 4831.53ms Time] [2021-11-12 23:16:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-11-12 23:16:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3372. [2021-11-12 23:16:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 2529 states have (on average 1.5610913404507711) internal successors, (3948), 2620 states have internal predecessors, (3948), 660 states have call successors, (660), 166 states have call predecessors, (660), 182 states have return successors, (720), 618 states have call predecessors, (720), 655 states have call successors, (720) [2021-11-12 23:16:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 5328 transitions. [2021-11-12 23:16:57,436 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 5328 transitions. Word has length 169 [2021-11-12 23:16:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:57,436 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 5328 transitions. [2021-11-12 23:16:57,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:16:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 5328 transitions. [2021-11-12 23:16:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 23:16:57,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:57,445 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] [2021-11-12 23:16:57,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:57,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:57,670 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1109789790, now seen corresponding path program 1 times [2021-11-12 23:16:57,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:57,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932891825] [2021-11-12 23:16:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:57,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:57,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:57,673 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:57,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:16:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:16:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:16:58,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:17:00,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:00,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932891825] [2021-11-12 23:17:00,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932891825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:00,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051741547] [2021-11-12 23:17:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:00,428 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:00,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:00,429 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:17:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:17:00,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:17:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:17:02,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051741547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:02,362 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:17:02,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:17:02,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154457473] [2021-11-12 23:17:02,363 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:02,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:17:02,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:17:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:17:02,364 INFO L87 Difference]: Start difference. First operand 3372 states and 5328 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-11-12 23:17:04,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:05,141 INFO L93 Difference]: Finished difference Result 6615 states and 10520 transitions. [2021-11-12 23:17:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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 171 [2021-11-12 23:17:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:05,170 INFO L225 Difference]: With dead ends: 6615 [2021-11-12 23:17:05,171 INFO L226 Difference]: Without dead ends: 3323 [2021-11-12 23:17:05,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:17:05,186 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1365 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 395 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2529.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2631.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:05,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 832 Invalid, 505 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [395 Valid, 109 Invalid, 1 Unknown, 0 Unchecked, 2631.19ms Time] [2021-11-12 23:17:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-11-12 23:17:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3323. [2021-11-12 23:17:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3323 states, 2497 states have (on average 1.5550660792951543) internal successors, (3883), 2587 states have internal predecessors, (3883), 643 states have call successors, (643), 166 states have call predecessors, (643), 182 states have return successors, (704), 602 states have call predecessors, (704), 639 states have call successors, (704) [2021-11-12 23:17:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3323 states to 3323 states and 5230 transitions. [2021-11-12 23:17:05,432 INFO L78 Accepts]: Start accepts. Automaton has 3323 states and 5230 transitions. Word has length 171 [2021-11-12 23:17:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:05,433 INFO L470 AbstractCegarLoop]: Abstraction has 3323 states and 5230 transitions. [2021-11-12 23:17:05,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-11-12 23:17:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3323 states and 5230 transitions. [2021-11-12 23:17:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:17:05,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:05,440 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] [2021-11-12 23:17:05,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:05,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 23:17:05,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:05,844 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 43447497, now seen corresponding path program 1 times [2021-11-12 23:17:05,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:05,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914117044] [2021-11-12 23:17:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:05,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:05,846 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:05,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:17:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:17:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:17:07,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:17:08,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:08,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914117044] [2021-11-12 23:17:08,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914117044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:08,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972632492] [2021-11-12 23:17:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:08,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:08,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:08,619 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:08,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:17:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:17:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:17:09,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:17:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972632492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:10,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880388141] [2021-11-12 23:17:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:10,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:10,879 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:10,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 23:17:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:17:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:17:11,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:17:13,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880388141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:13,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:17:13,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:17:13,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679199108] [2021-11-12 23:17:13,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:13,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:17:13,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:17:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:17:13,145 INFO L87 Difference]: Start difference. First operand 3323 states and 5230 transitions. Second operand has 18 states, 18 states have (on average 11.055555555555555) internal successors, (199), 14 states have internal predecessors, (199), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-12 23:17:15,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:17,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:19,185 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:21,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:32,039 INFO L93 Difference]: Finished difference Result 11402 states and 18489 transitions. [2021-11-12 23:17:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:17:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.055555555555555) internal successors, (199), 14 states have internal predecessors, (199), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) Word has length 172 [2021-11-12 23:17:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:32,087 INFO L225 Difference]: With dead ends: 11402 [2021-11-12 23:17:32,088 INFO L226 Difference]: Without dead ends: 8159 [2021-11-12 23:17:32,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:17:32,109 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 5300 mSDsluCounter, 4375 mSDsCounter, 0 mSdLazyCounter, 8556 mSolverCounterSat, 2021 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16849.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5385 SdHoareTripleChecker+Valid, 6165 SdHoareTripleChecker+Invalid, 10581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.12ms SdHoareTripleChecker+Time, 2021 IncrementalHoareTripleChecker+Valid, 8556 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18170.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:32,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5385 Valid, 6165 Invalid, 10581 Unknown, 0 Unchecked, 45.12ms Time], IncrementalHoareTripleChecker [2021 Valid, 8556 Invalid, 4 Unknown, 0 Unchecked, 18170.02ms Time] [2021-11-12 23:17:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8159 states. [2021-11-12 23:17:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8159 to 7348. [2021-11-12 23:17:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7348 states, 5463 states have (on average 1.5546403075233388) internal successors, (8493), 5657 states have internal predecessors, (8493), 1488 states have call successors, (1488), 325 states have call predecessors, (1488), 396 states have return successors, (1773), 1446 states have call predecessors, (1773), 1484 states have call successors, (1773) [2021-11-12 23:17:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 11754 transitions. [2021-11-12 23:17:32,784 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 11754 transitions. Word has length 172 [2021-11-12 23:17:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:32,785 INFO L470 AbstractCegarLoop]: Abstraction has 7348 states and 11754 transitions. [2021-11-12 23:17:32,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.055555555555555) internal successors, (199), 14 states have internal predecessors, (199), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-12 23:17:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 11754 transitions. [2021-11-12 23:17:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:17:32,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:32,801 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] [2021-11-12 23:17:32,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:33,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:33,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:33,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:33,417 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:33,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1090611922, now seen corresponding path program 1 times [2021-11-12 23:17:33,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:33,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563267754] [2021-11-12 23:17:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:33,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:33,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:33,422 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:33,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:17:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:17:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:17:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:17:35,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:35,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563267754] [2021-11-12 23:17:35,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563267754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:35,061 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:35,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:17:35,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933837356] [2021-11-12 23:17:35,062 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:35,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:17:35,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:17:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:17:35,063 INFO L87 Difference]: Start difference. First operand 7348 states and 11754 transitions. Second operand has 10 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:17:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:35,450 INFO L93 Difference]: Finished difference Result 10569 states and 16850 transitions. [2021-11-12 23:17:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:17:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 174 [2021-11-12 23:17:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:35,473 INFO L225 Difference]: With dead ends: 10569 [2021-11-12 23:17:35,473 INFO L226 Difference]: Without dead ends: 3291 [2021-11-12 23:17:35,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:17:35,500 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 89 mSDsluCounter, 6194 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 7090 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:35,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 7090 Invalid, 106 Unknown, 0 Unchecked, 7.07ms Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 138.06ms Time] [2021-11-12 23:17:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-11-12 23:17:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3291. [2021-11-12 23:17:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 2477 states have (on average 1.553492127573678) internal successors, (3848), 2567 states have internal predecessors, (3848), 631 states have call successors, (631), 166 states have call predecessors, (631), 182 states have return successors, (692), 590 states have call predecessors, (692), 627 states have call successors, (692) [2021-11-12 23:17:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5171 transitions. [2021-11-12 23:17:35,778 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5171 transitions. Word has length 174 [2021-11-12 23:17:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:35,778 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 5171 transitions. [2021-11-12 23:17:35,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:17:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5171 transitions. [2021-11-12 23:17:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:17:35,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:35,785 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, 1, 1, 1, 1] [2021-11-12 23:17:35,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:35,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:35,998 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash 874365074, now seen corresponding path program 1 times [2021-11-12 23:17:35,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:36,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819951914] [2021-11-12 23:17:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:36,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:36,001 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:36,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:17:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:36,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:17:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:17:37,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:17:38,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:38,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819951914] [2021-11-12 23:17:38,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819951914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:38,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437683739] [2021-11-12 23:17:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:38,450 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:38,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:38,451 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:38,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 23:17:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:17:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:17:39,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:17:40,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437683739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:40,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317477932] [2021-11-12 23:17:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:40,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:40,612 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:40,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-12 23:17:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:17:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:17:41,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:17:42,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317477932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:42,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:17:42,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:17:42,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542193861] [2021-11-12 23:17:42,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:42,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:17:42,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:17:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:17:42,637 INFO L87 Difference]: Start difference. First operand 3291 states and 5171 transitions. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-12 23:17:44,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:46,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:49,686 INFO L93 Difference]: Finished difference Result 6554 states and 10396 transitions. [2021-11-12 23:17:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:17:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) Word has length 180 [2021-11-12 23:17:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:49,709 INFO L225 Difference]: With dead ends: 6554 [2021-11-12 23:17:49,709 INFO L226 Difference]: Without dead ends: 3341 [2021-11-12 23:17:49,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:17:49,723 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 2028 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 591 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6377.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.64ms SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6767.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:49,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 2041 Invalid, 3137 Unknown, 0 Unchecked, 14.64ms Time], IncrementalHoareTripleChecker [591 Valid, 2544 Invalid, 2 Unknown, 0 Unchecked, 6767.98ms Time] [2021-11-12 23:17:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-11-12 23:17:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3315. [2021-11-12 23:17:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 2495 states have (on average 1.549498997995992) internal successors, (3866), 2585 states have internal predecessors, (3866), 631 states have call successors, (631), 166 states have call predecessors, (631), 188 states have return successors, (716), 596 states have call predecessors, (716), 627 states have call successors, (716) [2021-11-12 23:17:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 5213 transitions. [2021-11-12 23:17:49,956 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 5213 transitions. Word has length 180 [2021-11-12 23:17:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:49,957 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 5213 transitions. [2021-11-12 23:17:49,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-12 23:17:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 5213 transitions. [2021-11-12 23:17:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-12 23:17:49,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:49,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:49,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:50,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:50,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-12 23:17:50,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:50,568 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 850029828, now seen corresponding path program 1 times [2021-11-12 23:17:50,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:50,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291934212] [2021-11-12 23:17:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:50,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:50,571 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:50,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:17:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:17:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:17:51,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:17:52,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:52,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291934212] [2021-11-12 23:17:52,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291934212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:52,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2080645525] [2021-11-12 23:17:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:52,378 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:52,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:52,391 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:52,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 23:17:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:52,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:17:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:17:53,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:17:53,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2080645525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:53,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938267338] [2021-11-12 23:17:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:53,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:53,976 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:53,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 23:17:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:17:54,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:17:54,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:17:55,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938267338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:55,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:17:55,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:17:55,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591305855] [2021-11-12 23:17:55,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:55,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:17:55,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:17:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:17:55,524 INFO L87 Difference]: Start difference. First operand 3315 states and 5213 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 23:17:57,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:59,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:05,418 INFO L93 Difference]: Finished difference Result 11566 states and 18424 transitions. [2021-11-12 23:18:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:18:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) Word has length 181 [2021-11-12 23:18:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:05,461 INFO L225 Difference]: With dead ends: 11566 [2021-11-12 23:18:05,461 INFO L226 Difference]: Without dead ends: 8317 [2021-11-12 23:18:05,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1080 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:18:05,478 INFO L933 BasicCegarLoop]: 1454 mSDtfsCounter, 4779 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 4560 mSolverCounterSat, 1437 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8530.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4870 SdHoareTripleChecker+Valid, 3315 SdHoareTripleChecker+Invalid, 5999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.01ms SdHoareTripleChecker+Time, 1437 IncrementalHoareTripleChecker+Valid, 4560 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9287.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:05,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4870 Valid, 3315 Invalid, 5999 Unknown, 0 Unchecked, 25.01ms Time], IncrementalHoareTripleChecker [1437 Valid, 4560 Invalid, 2 Unknown, 0 Unchecked, 9287.63ms Time] [2021-11-12 23:18:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8317 states. [2021-11-12 23:18:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8317 to 8265. [2021-11-12 23:18:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 6237 states have (on average 1.5260541927208593) internal successors, (9518), 6443 states have internal predecessors, (9518), 1519 states have call successors, (1519), 466 states have call predecessors, (1519), 508 states have return successors, (1866), 1432 states have call predecessors, (1866), 1515 states have call successors, (1866) [2021-11-12 23:18:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 12903 transitions. [2021-11-12 23:18:06,181 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 12903 transitions. Word has length 181 [2021-11-12 23:18:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 12903 transitions. [2021-11-12 23:18:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 23:18:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 12903 transitions. [2021-11-12 23:18:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:18:06,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:06,187 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:06,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:06,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-12 23:18:06,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:06,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:06,810 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 500857302, now seen corresponding path program 1 times [2021-11-12 23:18:06,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:06,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040160003] [2021-11-12 23:18:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:06,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:06,813 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:06,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:18:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:18:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:18:09,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:18:16,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:16,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040160003] [2021-11-12 23:18:16,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040160003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:16,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:16,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 23:18:16,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591113072] [2021-11-12 23:18:16,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:16,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:18:16,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:18:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:18:16,198 INFO L87 Difference]: Start difference. First operand 8265 states and 12903 transitions. Second operand has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 11 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (41), 11 states have call predecessors, (41), 10 states have call successors, (41) [2021-11-12 23:18:18,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:27,807 INFO L93 Difference]: Finished difference Result 21329 states and 33751 transitions. [2021-11-12 23:18:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:18:27,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 11 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (41), 11 states have call predecessors, (41), 10 states have call successors, (41) Word has length 183 [2021-11-12 23:18:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:27,878 INFO L225 Difference]: With dead ends: 21329 [2021-11-12 23:18:27,878 INFO L226 Difference]: Without dead ends: 13116 [2021-11-12 23:18:27,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:18:27,964 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 5575 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 7189 mSolverCounterSat, 1527 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9123.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5694 SdHoareTripleChecker+Valid, 4116 SdHoareTripleChecker+Invalid, 8717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.86ms SdHoareTripleChecker+Time, 1527 IncrementalHoareTripleChecker+Valid, 7189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10200.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:27,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5694 Valid, 4116 Invalid, 8717 Unknown, 0 Unchecked, 33.86ms Time], IncrementalHoareTripleChecker [1527 Valid, 7189 Invalid, 1 Unknown, 0 Unchecked, 10200.49ms Time] [2021-11-12 23:18:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2021-11-12 23:18:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 12613. [2021-11-12 23:18:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12613 states, 9332 states have (on average 1.5226103729104157) internal successors, (14209), 9716 states have internal predecessors, (14209), 2538 states have call successors, (2538), 682 states have call predecessors, (2538), 742 states have return successors, (3029), 2368 states have call predecessors, (3029), 2534 states have call successors, (3029) [2021-11-12 23:18:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12613 states to 12613 states and 19776 transitions. [2021-11-12 23:18:29,085 INFO L78 Accepts]: Start accepts. Automaton has 12613 states and 19776 transitions. Word has length 183 [2021-11-12 23:18:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 12613 states and 19776 transitions. [2021-11-12 23:18:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 11 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (41), 11 states have call predecessors, (41), 10 states have call successors, (41) [2021-11-12 23:18:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12613 states and 19776 transitions. [2021-11-12 23:18:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-12 23:18:29,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:29,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:29,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:29,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:29,308 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash 754820137, now seen corresponding path program 1 times [2021-11-12 23:18:29,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:29,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401825586] [2021-11-12 23:18:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:29,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:29,311 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:29,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:18:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:30,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:18:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:18:30,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:18:31,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:31,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401825586] [2021-11-12 23:18:31,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401825586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:31,951 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:31,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:18:31,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28818806] [2021-11-12 23:18:31,952 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:31,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:18:31,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:18:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:18:31,954 INFO L87 Difference]: Start difference. First operand 12613 states and 19776 transitions. Second operand has 14 states, 14 states have (on average 15.285714285714286) internal successors, (214), 12 states have internal predecessors, (214), 8 states have call successors, (39), 6 states have call predecessors, (39), 7 states have return successors, (39), 10 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 23:18:33,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:35,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:37,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:40,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:42,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:44,013 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:46,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:58,186 INFO L93 Difference]: Finished difference Result 39082 states and 63621 transitions. [2021-11-12 23:18:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:18:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.285714285714286) internal successors, (214), 12 states have internal predecessors, (214), 8 states have call successors, (39), 6 states have call predecessors, (39), 7 states have return successors, (39), 10 states have call predecessors, (39), 7 states have call successors, (39) Word has length 187 [2021-11-12 23:18:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:58,379 INFO L225 Difference]: With dead ends: 39082 [2021-11-12 23:18:58,379 INFO L226 Difference]: Without dead ends: 26523 [2021-11-12 23:18:58,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:18:58,455 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 2465 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 9168 mSolverCounterSat, 936 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22954.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 5648 SdHoareTripleChecker+Invalid, 10111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.58ms SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 9168 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24259.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:58,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2569 Valid, 5648 Invalid, 10111 Unknown, 0 Unchecked, 45.58ms Time], IncrementalHoareTripleChecker [936 Valid, 9168 Invalid, 7 Unknown, 0 Unchecked, 24259.55ms Time] [2021-11-12 23:18:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26523 states. [2021-11-12 23:19:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26523 to 24560. [2021-11-12 23:19:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24560 states, 17559 states have (on average 1.5162025172276326) internal successors, (26623), 18523 states have internal predecessors, (26623), 5649 states have call successors, (5649), 1119 states have call predecessors, (5649), 1351 states have return successors, (7032), 5449 states have call predecessors, (7032), 5645 states have call successors, (7032) [2021-11-12 23:19:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24560 states to 24560 states and 39304 transitions. [2021-11-12 23:19:00,794 INFO L78 Accepts]: Start accepts. Automaton has 24560 states and 39304 transitions. Word has length 187 [2021-11-12 23:19:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:00,795 INFO L470 AbstractCegarLoop]: Abstraction has 24560 states and 39304 transitions. [2021-11-12 23:19:00,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.285714285714286) internal successors, (214), 12 states have internal predecessors, (214), 8 states have call successors, (39), 6 states have call predecessors, (39), 7 states have return successors, (39), 10 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 23:19:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 24560 states and 39304 transitions. [2021-11-12 23:19:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-12 23:19:00,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:00,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:00,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:01,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:01,019 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash 262193963, now seen corresponding path program 1 times [2021-11-12 23:19:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:01,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68897181] [2021-11-12 23:19:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:01,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:01,022 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:01,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:19:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:19:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:19:02,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:19:04,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:04,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68897181] [2021-11-12 23:19:04,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68897181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:19:04,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:19:04,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 23:19:04,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265072189] [2021-11-12 23:19:04,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:04,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:19:04,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:19:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:19:04,020 INFO L87 Difference]: Start difference. First operand 24560 states and 39304 transitions. Second operand has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 14 states have internal predecessors, (196), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (39), 12 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 23:19:06,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:08,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:10,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:12,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:14,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:16,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:18,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:20,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:26,887 INFO L93 Difference]: Finished difference Result 45759 states and 73575 transitions. [2021-11-12 23:19:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:19:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 14 states have internal predecessors, (196), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (39), 12 states have call predecessors, (39), 7 states have call successors, (39) Word has length 187 [2021-11-12 23:19:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:27,007 INFO L225 Difference]: With dead ends: 45759 [2021-11-12 23:19:27,008 INFO L226 Difference]: Without dead ends: 24425 [2021-11-12 23:19:27,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:19:27,191 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1385 mSDsluCounter, 2738 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 395 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20318.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 5878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.08ms SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20971.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:27,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 3540 Invalid, 5878 Unknown, 0 Unchecked, 23.08ms Time], IncrementalHoareTripleChecker [395 Valid, 5475 Invalid, 8 Unknown, 0 Unchecked, 20971.43ms Time] [2021-11-12 23:19:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24425 states. [2021-11-12 23:19:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24425 to 24425. [2021-11-12 23:19:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24425 states, 17484 states have (on average 1.5158430565088081) internal successors, (26503), 18448 states have internal predecessors, (26503), 5604 states have call successors, (5604), 1104 states have call predecessors, (5604), 1336 states have return successors, (6987), 5404 states have call predecessors, (6987), 5600 states have call successors, (6987) [2021-11-12 23:19:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24425 states to 24425 states and 39094 transitions. [2021-11-12 23:19:29,106 INFO L78 Accepts]: Start accepts. Automaton has 24425 states and 39094 transitions. Word has length 187 [2021-11-12 23:19:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:29,107 INFO L470 AbstractCegarLoop]: Abstraction has 24425 states and 39094 transitions. [2021-11-12 23:19:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 14 states have internal predecessors, (196), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (39), 12 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 23:19:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 24425 states and 39094 transitions. [2021-11-12 23:19:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 23:19:29,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:29,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:29,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-12 23:19:29,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:29,330 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:29,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1567972864, now seen corresponding path program 1 times [2021-11-12 23:19:29,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:29,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795040674] [2021-11-12 23:19:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:29,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:29,333 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:19:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:19:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:19:30,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:19:31,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:31,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795040674] [2021-11-12 23:19:31,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795040674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:19:31,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:19:31,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:19:31,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786850814] [2021-11-12 23:19:31,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:31,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:19:31,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:31,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:19:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:19:31,303 INFO L87 Difference]: Start difference. First operand 24425 states and 39094 transitions. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:19:33,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:35,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:44,395 INFO L93 Difference]: Finished difference Result 84543 states and 140806 transitions. [2021-11-12 23:19:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:19:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) Word has length 194 [2021-11-12 23:19:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:44,935 INFO L225 Difference]: With dead ends: 84543 [2021-11-12 23:19:44,935 INFO L226 Difference]: Without dead ends: 60183 [2021-11-12 23:19:45,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:19:45,039 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 4062 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2768 mSolverCounterSat, 1312 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7956.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 4082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.87ms SdHoareTripleChecker+Time, 1312 IncrementalHoareTripleChecker+Valid, 2768 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8598.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:45,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4165 Valid, 3008 Invalid, 4082 Unknown, 0 Unchecked, 21.87ms Time], IncrementalHoareTripleChecker [1312 Valid, 2768 Invalid, 2 Unknown, 0 Unchecked, 8598.54ms Time] [2021-11-12 23:19:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60183 states. [2021-11-12 23:19:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60183 to 55275. [2021-11-12 23:19:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55275 states, 38003 states have (on average 1.5121437781227798) internal successors, (57466), 40556 states have internal predecessors, (57466), 14540 states have call successors, (14540), 1978 states have call predecessors, (14540), 2731 states have return successors, (18892), 14434 states have call predecessors, (18892), 14536 states have call successors, (18892) [2021-11-12 23:19:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55275 states to 55275 states and 90898 transitions. [2021-11-12 23:19:50,102 INFO L78 Accepts]: Start accepts. Automaton has 55275 states and 90898 transitions. Word has length 194 [2021-11-12 23:19:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:50,104 INFO L470 AbstractCegarLoop]: Abstraction has 55275 states and 90898 transitions. [2021-11-12 23:19:50,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:19:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55275 states and 90898 transitions. [2021-11-12 23:19:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 23:19:50,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:50,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:50,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:50,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:50,327 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1881590044, now seen corresponding path program 1 times [2021-11-12 23:19:50,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:50,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495800378] [2021-11-12 23:19:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:50,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:50,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:50,329 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:50,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4db9ee7-843a-4432-ab68-d5c06bc90b9e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:19:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:19:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:19:51,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:19:52,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:52,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495800378] [2021-11-12 23:19:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495800378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:19:52,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:19:52,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:19:52,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896711470] [2021-11-12 23:19:52,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:52,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:19:52,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:19:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:19:52,288 INFO L87 Difference]: Start difference. First operand 55275 states and 90898 transitions. Second operand has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:19:54,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:56,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:15,222 INFO L93 Difference]: Finished difference Result 212467 states and 364184 transitions. [2021-11-12 23:20:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:20:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) Word has length 195 [2021-11-12 23:20:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:16,671 INFO L225 Difference]: With dead ends: 212467 [2021-11-12 23:20:16,671 INFO L226 Difference]: Without dead ends: 157267 [2021-11-12 23:20:16,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:20:16,970 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 4362 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 1543 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7829.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4466 SdHoareTripleChecker+Valid, 2984 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.68ms SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8457.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:16,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4466 Valid, 2984 Invalid, 4325 Unknown, 0 Unchecked, 22.68ms Time], IncrementalHoareTripleChecker [1543 Valid, 2780 Invalid, 2 Unknown, 0 Unchecked, 8457.72ms Time] [2021-11-12 23:20:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157267 states.