./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.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_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/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_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/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_f2acae24-4488-451d-8c2c-fd673dac374a/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 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:00:01,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:00:01,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:00:01,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:00:01,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:00:01,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:00:01,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:00:01,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:00:01,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:00:01,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:00:01,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:00:01,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:00:01,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:00:01,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:00:01,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:00:01,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:00:01,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:00:01,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:00:01,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:00:01,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:00:01,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:00:01,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:00:01,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:00:01,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:00:01,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:00:01,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:00:01,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:00:01,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:00:01,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:00:01,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:00:01,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:00:01,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:00:01,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:00:01,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:00:01,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:00:01,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:00:01,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:00:01,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:00:01,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:00:01,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:00:01,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:00:01,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:00:01,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:00:01,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:00:01,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:00:01,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:00:01,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:00:01,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:00:01,627 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:00:01,627 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:00:01,627 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:00:01,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:00:01,636 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:00:01,636 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:00:01,637 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:00:01,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:00:01,637 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:00:01,638 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:00:01,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:00:01,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:00:01,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:00:01,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:00:01,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:00:01,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:00:01,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:00:01,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:00:01,641 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:00:01,641 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:00:01,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:00:01,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:00:01,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:00:01,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:00:01,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:00:01,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:00:01,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:00:01,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:00:01,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:00:01,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:00:01,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:00:01,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:00:01,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:00:01,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:00:01,647 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_f2acae24-4488-451d-8c2c-fd673dac374a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 [2021-11-12 23:00:01,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:00:01,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:00:01,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:00:01,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:00:01,970 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:00:01,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2021-11-12 23:00:02,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/2fe8c678b/cc91f00edb9f47a6bb39acd7b00238d3/FLAG6854c5865 [2021-11-12 23:00:02,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:00:02,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2021-11-12 23:00:02,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/2fe8c678b/cc91f00edb9f47a6bb39acd7b00238d3/FLAG6854c5865 [2021-11-12 23:00:03,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/2fe8c678b/cc91f00edb9f47a6bb39acd7b00238d3 [2021-11-12 23:00:03,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:00:03,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:00:03,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:00:03,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:00:03,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:00:03,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:00:03" (1/1) ... [2021-11-12 23:00:03,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc125a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:03, skipping insertion in model container [2021-11-12 23:00:03,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:00:03" (1/1) ... [2021-11-12 23:00:03,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:00:03,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:00:03,756 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_f2acae24-4488-451d-8c2c-fd673dac374a/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2021-11-12 23:00:03,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:00:03,865 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 23:00:03,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a51fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:03, skipping insertion in model container [2021-11-12 23:00:03,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:00:03,867 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:00:03,869 INFO L158 Benchmark]: Toolchain (without parser) took 822.21ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 61.1MB in the beginning and 84.4MB in the end (delta: -23.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:00:03,870 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:00:03,871 INFO L158 Benchmark]: CACSL2BoogieTranslator took 813.45ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 60.9MB in the beginning and 84.8MB in the end (delta: -23.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:00:03,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 813.45ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 60.9MB in the beginning and 84.8MB in the end (delta: -23.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/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_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/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_f2acae24-4488-451d-8c2c-fd673dac374a/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 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:00:06,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:00:06,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:00:06,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:00:06,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:00:06,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:00:06,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:00:06,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:00:06,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:00:06,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:00:06,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:00:06,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:00:06,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:00:06,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:00:06,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:00:06,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:00:06,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:00:06,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:00:06,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:00:06,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:00:06,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:00:06,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:00:06,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:00:06,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:00:06,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:00:06,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:00:06,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:00:06,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:00:06,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:00:06,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:00:06,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:00:06,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:00:06,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:00:06,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:00:06,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:00:06,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:00:06,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:00:06,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:00:06,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:00:06,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:00:06,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:00:06,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:00:06,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:00:06,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:00:06,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:00:06,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:00:06,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:00:06,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:00:06,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:00:06,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:00:06,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:00:06,692 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:00:06,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:00:06,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:00:06,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:00:06,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:00:06,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:00:06,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:00:06,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:00:06,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:00:06,698 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:00:06,698 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:00:06,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:00:06,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:00:06,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:00:06,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:00:06,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:00:06,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:00:06,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:00:06,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:00:06,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:00:06,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:00:06,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:00:06,701 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:00:06,701 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:06,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:00:06,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:00:06,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:00:06,703 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_f2acae24-4488-451d-8c2c-fd673dac374a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 [2021-11-12 23:00:07,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:00:07,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:00:07,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:00:07,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:00:07,189 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:00:07,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2021-11-12 23:00:07,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/e2afdddf4/77d729de427443b7b80ca1791530293c/FLAG70a6949c8 [2021-11-12 23:00:08,070 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:00:08,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2021-11-12 23:00:08,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/e2afdddf4/77d729de427443b7b80ca1791530293c/FLAG70a6949c8 [2021-11-12 23:00:08,211 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/data/e2afdddf4/77d729de427443b7b80ca1791530293c [2021-11-12 23:00:08,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:00:08,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:00:08,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:00:08,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:00:08,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:00:08,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:00:08" (1/1) ... [2021-11-12 23:00:08,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ab9dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:08, skipping insertion in model container [2021-11-12 23:00:08,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:00:08" (1/1) ... [2021-11-12 23:00:08,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:00:08,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:00:09,154 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_f2acae24-4488-451d-8c2c-fd673dac374a/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2021-11-12 23:00:09,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:00:09,255 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:00:09,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:00:09,375 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_f2acae24-4488-451d-8c2c-fd673dac374a/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2021-11-12 23:00:09,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:00:09,404 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:00:09,493 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_f2acae24-4488-451d-8c2c-fd673dac374a/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2021-11-12 23:00:09,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:00:09,543 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:00:09,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09 WrapperNode [2021-11-12 23:00:09,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:00:09,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:00:09,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:00:09,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:00:09,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:00:09,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:00:09,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:00:09,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:00:09,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:00:09,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:00:09,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:00:09,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:00:09,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (1/1) ... [2021-11-12 23:00:09,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:00:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:00:09,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:00:09,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:00:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:00:09,910 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:00:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-12 23:00:09,911 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-12 23:00:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:00:09,911 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:00:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:00:09,911 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:00:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:00:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:00:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:00:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:00:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:00:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:00:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:00:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:00:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:00:09,913 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:00:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:00:09,914 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:00:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:00:09,914 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:00:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:00:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:00:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:00:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:00:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:00:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:00:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:00:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:00:09,916 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:00:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:00:09,917 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:00:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:00:09,918 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:00:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:00:09,918 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:00:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:00:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:00:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:00:09,919 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:00:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:00:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:00:09,920 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:00:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:00:09,920 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:00:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:00:09,921 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:00:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:00:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:00:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:00:09,924 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:00:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:00:09,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:00:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:00:09,925 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:00:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:00:09,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:00:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:00:09,926 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:00:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:00:09,927 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:00:14,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:00:14,400 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 23:00:14,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:00:14 BoogieIcfgContainer [2021-11-12 23:00:14,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:00:14,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:00:14,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:00:14,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:00:14,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:00:08" (1/3) ... [2021-11-12 23:00:14,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351b6651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:00:14, skipping insertion in model container [2021-11-12 23:00:14,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:00:09" (2/3) ... [2021-11-12 23:00:14,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351b6651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:00:14, skipping insertion in model container [2021-11-12 23:00:14,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:00:14" (3/3) ... [2021-11-12 23:00:14,414 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2021-11-12 23:00:14,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:00:14,421 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:00:14,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:00:14,505 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 23:00:14,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:00:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 628 states, 487 states have (on average 1.6714579055441479) internal successors, (814), 507 states have internal predecessors, (814), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-12 23:00:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:00:14,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:14,583 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] [2021-11-12 23:00:14,584 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1869945943, now seen corresponding path program 1 times [2021-11-12 23:00:14,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:14,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461093291] [2021-11-12 23:00:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:14,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:14,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:14,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:00:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:00:15,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:00:16,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:16,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461093291] [2021-11-12 23:00:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461093291] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:16,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:16,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:00:16,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244614830] [2021-11-12 23:00:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:16,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:00:16,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:00:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:00:16,130 INFO L87 Difference]: Start difference. First operand has 628 states, 487 states have (on average 1.6714579055441479) internal successors, (814), 507 states have internal predecessors, (814), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:00:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:16,406 INFO L93 Difference]: Finished difference Result 1250 states and 2076 transitions. [2021-11-12 23:00:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:16,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-12 23:00:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:16,437 INFO L225 Difference]: With dead ends: 1250 [2021-11-12 23:00:16,437 INFO L226 Difference]: Without dead ends: 622 [2021-11-12 23:00:16,449 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 23:00:16,453 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 15 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.37ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:16,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3012 Invalid, 43 Unknown, 0 Unchecked, 35.37ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 52.32ms Time] [2021-11-12 23:00:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-12 23:00:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2021-11-12 23:00:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 483 states have (on average 1.650103519668737) internal successors, (797), 501 states have internal predecessors, (797), 110 states have call successors, (110), 30 states have call predecessors, (110), 28 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-12 23:00:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1014 transitions. [2021-11-12 23:00:16,590 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1014 transitions. Word has length 99 [2021-11-12 23:00:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1014 transitions. [2021-11-12 23:00:16,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:00:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1014 transitions. [2021-11-12 23:00:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:00:16,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:16,605 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:00:16,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:00:16,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:16,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash -56223332, now seen corresponding path program 1 times [2021-11-12 23:00:16,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:16,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104021306] [2021-11-12 23:00:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:16,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:16,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:16,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:16,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:00:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:17,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:00:17,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:00:18,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:18,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104021306] [2021-11-12 23:00:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104021306] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:18,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:18,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:00:18,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854530601] [2021-11-12 23:00:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:18,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:00:18,030 INFO L87 Difference]: Start difference. First operand 622 states and 1014 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:00:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:18,409 INFO L93 Difference]: Finished difference Result 1256 states and 2053 transitions. [2021-11-12 23:00:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-11-12 23:00:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:18,421 INFO L225 Difference]: With dead ends: 1256 [2021-11-12 23:00:18,422 INFO L226 Difference]: Without dead ends: 644 [2021-11-12 23:00:18,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 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 23:00:18,429 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 119 mSDsluCounter, 4918 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5923 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 263.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:18,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5923 Invalid, 98 Unknown, 0 Unchecked, 20.84ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 263.71ms Time] [2021-11-12 23:00:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-12 23:00:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 635. [2021-11-12 23:00:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 493 states have (on average 1.6470588235294117) internal successors, (812), 513 states have internal predecessors, (812), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-12 23:00:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1036 transitions. [2021-11-12 23:00:18,498 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1036 transitions. Word has length 85 [2021-11-12 23:00:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1036 transitions. [2021-11-12 23:00:18,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:00:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1036 transitions. [2021-11-12 23:00:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:00:18,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:18,508 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] [2021-11-12 23:00:18,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:18,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:18,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash -94231770, now seen corresponding path program 1 times [2021-11-12 23:00:18,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:18,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039260817] [2021-11-12 23:00:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:18,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:18,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:00:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:19,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:00:19,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:20,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:20,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039260817] [2021-11-12 23:00:20,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039260817] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:20,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:20,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:00:20,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118129000] [2021-11-12 23:00:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:20,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:20,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:00:20,224 INFO L87 Difference]: Start difference. First operand 635 states and 1036 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:20,664 INFO L93 Difference]: Finished difference Result 1276 states and 2086 transitions. [2021-11-12 23:00:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:20,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2021-11-12 23:00:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:20,674 INFO L225 Difference]: With dead ends: 1276 [2021-11-12 23:00:20,675 INFO L226 Difference]: Without dead ends: 653 [2021-11-12 23:00:20,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 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 23:00:20,681 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 105 mSDsluCounter, 4953 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 295.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5970 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 328.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:20,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5970 Invalid, 120 Unknown, 0 Unchecked, 20.38ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 328.18ms Time] [2021-11-12 23:00:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-12 23:00:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 635. [2021-11-12 23:00:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 493 states have (on average 1.6470588235294117) internal successors, (812), 513 states have internal predecessors, (812), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-12 23:00:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1036 transitions. [2021-11-12 23:00:20,735 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1036 transitions. Word has length 102 [2021-11-12 23:00:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1036 transitions. [2021-11-12 23:00:20,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1036 transitions. [2021-11-12 23:00:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:00:20,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:20,740 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:00:20,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:20,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:20,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1641650781, now seen corresponding path program 1 times [2021-11-12 23:00:20,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:20,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048728045] [2021-11-12 23:00:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:20,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:20,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:20,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:00:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:00:21,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:00:21,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:21,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048728045] [2021-11-12 23:00:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048728045] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:21,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:21,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:00:21,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718867907] [2021-11-12 23:00:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:21,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:00:21,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:00:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:00:21,985 INFO L87 Difference]: Start difference. First operand 635 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:00:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:22,116 INFO L93 Difference]: Finished difference Result 1261 states and 2061 transitions. [2021-11-12 23:00:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-12 23:00:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:22,124 INFO L225 Difference]: With dead ends: 1261 [2021-11-12 23:00:22,125 INFO L226 Difference]: Without dead ends: 636 [2021-11-12 23:00:22,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 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 23:00:22,131 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 22 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.16ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:22,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2979 Invalid, 36 Unknown, 0 Unchecked, 7.16ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 52.63ms Time] [2021-11-12 23:00:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-12 23:00:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2021-11-12 23:00:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 495 states have (on average 1.6464646464646464) internal successors, (815), 514 states have internal predecessors, (815), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (109), 104 states have call predecessors, (109), 107 states have call successors, (109) [2021-11-12 23:00:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1034 transitions. [2021-11-12 23:00:22,166 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1034 transitions. Word has length 86 [2021-11-12 23:00:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:22,166 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1034 transitions. [2021-11-12 23:00:22,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:00:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1034 transitions. [2021-11-12 23:00:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:00:22,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:22,170 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:00:22,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:22,386 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1336244195, now seen corresponding path program 1 times [2021-11-12 23:00:22,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:22,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34662950] [2021-11-12 23:00:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:22,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:22,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:22,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:22,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:00:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:00:23,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:00:23,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:23,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34662950] [2021-11-12 23:00:23,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34662950] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:23,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:23,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:00:23,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086426853] [2021-11-12 23:00:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:23,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:23,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:00:23,654 INFO L87 Difference]: Start difference. First operand 636 states and 1034 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:00:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:24,009 INFO L93 Difference]: Finished difference Result 1266 states and 2066 transitions. [2021-11-12 23:00:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-12 23:00:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:24,020 INFO L225 Difference]: With dead ends: 1266 [2021-11-12 23:00:24,020 INFO L226 Difference]: Without dead ends: 645 [2021-11-12 23:00:24,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 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 23:00:24,028 INFO L933 BasicCegarLoop]: 1009 mSDtfsCounter, 104 mSDsluCounter, 4910 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5919 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:24,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5919 Invalid, 107 Unknown, 0 Unchecked, 18.30ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 257.63ms Time] [2021-11-12 23:00:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-12 23:00:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 636. [2021-11-12 23:00:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 495 states have (on average 1.6464646464646464) internal successors, (815), 514 states have internal predecessors, (815), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (109), 104 states have call predecessors, (109), 107 states have call successors, (109) [2021-11-12 23:00:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1034 transitions. [2021-11-12 23:00:24,065 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1034 transitions. Word has length 88 [2021-11-12 23:00:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:24,066 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1034 transitions. [2021-11-12 23:00:24,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:00:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1034 transitions. [2021-11-12 23:00:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:00:24,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:24,069 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:00:24,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:24,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:24,288 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1874183030, now seen corresponding path program 1 times [2021-11-12 23:00:24,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:24,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728723443] [2021-11-12 23:00:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:24,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:24,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:24,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:24,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:00:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:00:24,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:00:25,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:25,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728723443] [2021-11-12 23:00:25,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728723443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:25,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:25,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:00:25,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248662339] [2021-11-12 23:00:25,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:25,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:00:25,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:25,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:00:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:00:25,289 INFO L87 Difference]: Start difference. First operand 636 states and 1034 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), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:00:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:25,573 INFO L93 Difference]: Finished difference Result 1286 states and 2104 transitions. [2021-11-12 23:00:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:25,574 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), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2021-11-12 23:00:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:25,582 INFO L225 Difference]: With dead ends: 1286 [2021-11-12 23:00:25,582 INFO L226 Difference]: Without dead ends: 665 [2021-11-12 23:00:25,587 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 23:00:25,588 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 112 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.02ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:25,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2823 Invalid, 147 Unknown, 0 Unchecked, 7.02ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 226.36ms Time] [2021-11-12 23:00:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-12 23:00:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 656. [2021-11-12 23:00:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 514 states have (on average 1.6420233463035019) internal successors, (844), 533 states have internal predecessors, (844), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 23:00:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1062 transitions. [2021-11-12 23:00:25,621 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1062 transitions. Word has length 89 [2021-11-12 23:00:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:25,622 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1062 transitions. [2021-11-12 23:00:25,622 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), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:00:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1062 transitions. [2021-11-12 23:00:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:00:25,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:25,625 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] [2021-11-12 23:00:25,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:25,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:25,842 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash 803216278, now seen corresponding path program 1 times [2021-11-12 23:00:25,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:25,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988485845] [2021-11-12 23:00:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:25,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:25,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:25,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:00:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:00:26,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:27,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:27,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988485845] [2021-11-12 23:00:27,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988485845] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:27,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:27,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:00:27,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489169654] [2021-11-12 23:00:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:27,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:27,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:00:27,094 INFO L87 Difference]: Start difference. First operand 656 states and 1062 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:27,392 INFO L93 Difference]: Finished difference Result 1315 states and 2135 transitions. [2021-11-12 23:00:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2021-11-12 23:00:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:27,401 INFO L225 Difference]: With dead ends: 1315 [2021-11-12 23:00:27,402 INFO L226 Difference]: Without dead ends: 674 [2021-11-12 23:00:27,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 23:00:27,407 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 154 mSDsluCounter, 4838 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5835 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.21ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 212.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:27,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5835 Invalid, 89 Unknown, 0 Unchecked, 12.21ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 212.02ms Time] [2021-11-12 23:00:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-12 23:00:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 656. [2021-11-12 23:00:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 514 states have (on average 1.6420233463035019) internal successors, (844), 533 states have internal predecessors, (844), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 23:00:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1062 transitions. [2021-11-12 23:00:27,445 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1062 transitions. Word has length 106 [2021-11-12 23:00:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:27,446 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1062 transitions. [2021-11-12 23:00:27,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1062 transitions. [2021-11-12 23:00:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:00:27,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:27,449 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] [2021-11-12 23:00:27,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:27,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:27,658 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 157764577, now seen corresponding path program 1 times [2021-11-12 23:00:27,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:27,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755438041] [2021-11-12 23:00:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:27,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:27,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:27,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:00:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:00:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:00:28,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:29,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:29,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755438041] [2021-11-12 23:00:29,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755438041] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:29,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:29,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:00:29,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054957955] [2021-11-12 23:00:29,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:29,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:00:29,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:00:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:00:29,171 INFO L87 Difference]: Start difference. First operand 656 states and 1062 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:29,578 INFO L93 Difference]: Finished difference Result 1310 states and 2126 transitions. [2021-11-12 23:00:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:00:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2021-11-12 23:00:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:29,588 INFO L225 Difference]: With dead ends: 1310 [2021-11-12 23:00:29,588 INFO L226 Difference]: Without dead ends: 669 [2021-11-12 23:00:29,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 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 23:00:29,599 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 112 mSDsluCounter, 5815 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6802 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.40ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 280.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:29,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6802 Invalid, 160 Unknown, 0 Unchecked, 15.40ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 280.84ms Time] [2021-11-12 23:00:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-12 23:00:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 660. [2021-11-12 23:00:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 518 states have (on average 1.6370656370656371) internal successors, (848), 537 states have internal predecessors, (848), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 23:00:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1066 transitions. [2021-11-12 23:00:29,648 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1066 transitions. Word has length 107 [2021-11-12 23:00:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:29,649 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1066 transitions. [2021-11-12 23:00:29,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1066 transitions. [2021-11-12 23:00:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:00:29,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:29,653 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] [2021-11-12 23:00:29,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:29,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:29,881 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash -762132362, now seen corresponding path program 1 times [2021-11-12 23:00:29,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:29,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614538752] [2021-11-12 23:00:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:29,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:29,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:29,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:00:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:00:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:00:30,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:31,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:31,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614538752] [2021-11-12 23:00:31,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614538752] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:31,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:31,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:00:31,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496168030] [2021-11-12 23:00:31,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:00:31,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:00:31,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:00:31,319 INFO L87 Difference]: Start difference. First operand 660 states and 1066 transitions. Second operand has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:31,829 INFO L93 Difference]: Finished difference Result 1320 states and 2138 transitions. [2021-11-12 23:00:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:00:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2021-11-12 23:00:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:31,839 INFO L225 Difference]: With dead ends: 1320 [2021-11-12 23:00:31,839 INFO L226 Difference]: Without dead ends: 675 [2021-11-12 23:00:31,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:00:31,845 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 108 mSDsluCounter, 5821 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6810 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.67ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 377.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:31,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6810 Invalid, 179 Unknown, 0 Unchecked, 12.67ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 377.11ms Time] [2021-11-12 23:00:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-12 23:00:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 666. [2021-11-12 23:00:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 524 states have (on average 1.6297709923664123) internal successors, (854), 543 states have internal predecessors, (854), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 23:00:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1072 transitions. [2021-11-12 23:00:31,880 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1072 transitions. Word has length 108 [2021-11-12 23:00:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:31,881 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1072 transitions. [2021-11-12 23:00:31,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1072 transitions. [2021-11-12 23:00:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:00:31,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:31,885 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] [2021-11-12 23:00:31,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:32,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:32,098 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:32,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1764510116, now seen corresponding path program 1 times [2021-11-12 23:00:32,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:32,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616949880] [2021-11-12 23:00:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:32,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:32,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:32,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:00:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:00:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:00:32,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:33,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:33,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616949880] [2021-11-12 23:00:33,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616949880] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:00:33,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:00:33,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:00:33,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963691219] [2021-11-12 23:00:33,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:33,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:00:33,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:00:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:00:33,485 INFO L87 Difference]: Start difference. First operand 666 states and 1072 transitions. Second operand has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:33,936 INFO L93 Difference]: Finished difference Result 1334 states and 2154 transitions. [2021-11-12 23:00:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:00:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2021-11-12 23:00:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:33,945 INFO L225 Difference]: With dead ends: 1334 [2021-11-12 23:00:33,945 INFO L226 Difference]: Without dead ends: 683 [2021-11-12 23:00:33,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:00:33,951 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 108 mSDsluCounter, 5821 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 307.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6810 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.22ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:33,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6810 Invalid, 184 Unknown, 0 Unchecked, 9.22ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 348.70ms Time] [2021-11-12 23:00:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-12 23:00:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 674. [2021-11-12 23:00:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 532 states have (on average 1.6203007518796992) internal successors, (862), 551 states have internal predecessors, (862), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 23:00:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1080 transitions. [2021-11-12 23:00:34,025 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1080 transitions. Word has length 109 [2021-11-12 23:00:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:34,025 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1080 transitions. [2021-11-12 23:00:34,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:00:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1080 transitions. [2021-11-12 23:00:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 23:00:34,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:34,029 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] [2021-11-12 23:00:34,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:34,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:34,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:34,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1028825839, now seen corresponding path program 1 times [2021-11-12 23:00:34,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:34,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118853809] [2021-11-12 23:00:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:34,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:34,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:34,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:34,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:00:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:00:35,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:35,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:35,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118853809] [2021-11-12 23:00:35,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118853809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:35,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:35,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:00:35,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711950018] [2021-11-12 23:00:35,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:35,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:00:35,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:00:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:00:35,437 INFO L87 Difference]: Start difference. First operand 674 states and 1080 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:00:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:35,869 INFO L93 Difference]: Finished difference Result 1273 states and 2038 transitions. [2021-11-12 23:00:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:00:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 110 [2021-11-12 23:00:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:35,883 INFO L225 Difference]: With dead ends: 1273 [2021-11-12 23:00:35,883 INFO L226 Difference]: Without dead ends: 692 [2021-11-12 23:00:35,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 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 23:00:35,889 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 176 mSDsluCounter, 7866 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 310.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 8863 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.53ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 354.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:35,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 8863 Invalid, 160 Unknown, 0 Unchecked, 10.53ms Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 354.73ms Time] [2021-11-12 23:00:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-12 23:00:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 681. [2021-11-12 23:00:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 536 states have (on average 1.6156716417910448) internal successors, (866), 557 states have internal predecessors, (866), 111 states have call successors, (111), 32 states have call predecessors, (111), 33 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2021-11-12 23:00:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1089 transitions. [2021-11-12 23:00:35,930 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1089 transitions. Word has length 110 [2021-11-12 23:00:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:35,931 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1089 transitions. [2021-11-12 23:00:35,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:00:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1089 transitions. [2021-11-12 23:00:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:00:35,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:35,937 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] [2021-11-12 23:00:35,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:36,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:36,158 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1204122437, now seen corresponding path program 1 times [2021-11-12 23:00:36,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:36,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692592802] [2021-11-12 23:00:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:36,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:36,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:36,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:00:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:36,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:00:36,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:00:37,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:37,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692592802] [2021-11-12 23:00:37,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692592802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:37,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:37,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:00:37,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252378611] [2021-11-12 23:00:37,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:37,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:00:37,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:00:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:00:37,425 INFO L87 Difference]: Start difference. First operand 681 states and 1089 transitions. Second operand has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:00:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:37,749 INFO L93 Difference]: Finished difference Result 1276 states and 2041 transitions. [2021-11-12 23:00:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:00:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2021-11-12 23:00:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:37,774 INFO L225 Difference]: With dead ends: 1276 [2021-11-12 23:00:37,775 INFO L226 Difference]: Without dead ends: 695 [2021-11-12 23:00:37,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 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 23:00:37,780 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 180 mSDsluCounter, 4968 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 5967 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.23ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 267.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:37,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 5967 Invalid, 127 Unknown, 0 Unchecked, 7.23ms Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 267.50ms Time] [2021-11-12 23:00:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-11-12 23:00:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 688. [2021-11-12 23:00:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 540 states have (on average 1.6111111111111112) internal successors, (870), 563 states have internal predecessors, (870), 112 states have call successors, (112), 32 states have call predecessors, (112), 35 states have return successors, (116), 106 states have call predecessors, (116), 109 states have call successors, (116) [2021-11-12 23:00:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1098 transitions. [2021-11-12 23:00:37,813 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1098 transitions. Word has length 112 [2021-11-12 23:00:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:37,814 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 1098 transitions. [2021-11-12 23:00:37,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:00:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1098 transitions. [2021-11-12 23:00:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:00:37,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:37,818 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:00:37,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:38,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:38,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1425844224, now seen corresponding path program 1 times [2021-11-12 23:00:38,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:38,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299262334] [2021-11-12 23:00:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:38,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:38,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:38,044 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:38,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:00:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:00:38,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:00:38,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:00:39,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:39,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299262334] [2021-11-12 23:00:39,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299262334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:39,124 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:39,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:00:39,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647716269] [2021-11-12 23:00:39,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:39,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:00:39,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:39,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:00:39,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:00:39,127 INFO L87 Difference]: Start difference. First operand 688 states and 1098 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:00:39,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:39,416 INFO L93 Difference]: Finished difference Result 1277 states and 2042 transitions. [2021-11-12 23:00:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:39,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 96 [2021-11-12 23:00:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:39,427 INFO L225 Difference]: With dead ends: 1277 [2021-11-12 23:00:39,428 INFO L226 Difference]: Without dead ends: 696 [2021-11-12 23:00:39,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 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 23:00:39,433 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 145 mSDsluCounter, 4856 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 5857 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.07ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:39,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 5857 Invalid, 93 Unknown, 0 Unchecked, 8.07ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 205.23ms Time] [2021-11-12 23:00:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-12 23:00:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 691. [2021-11-12 23:00:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 542 states have (on average 1.6088560885608856) internal successors, (872), 566 states have internal predecessors, (872), 112 states have call successors, (112), 32 states have call predecessors, (112), 36 states have return successors, (117), 106 states have call predecessors, (117), 109 states have call successors, (117) [2021-11-12 23:00:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1101 transitions. [2021-11-12 23:00:39,468 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1101 transitions. Word has length 96 [2021-11-12 23:00:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:39,468 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1101 transitions. [2021-11-12 23:00:39,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:00:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1101 transitions. [2021-11-12 23:00:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:00:39,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:39,472 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:39,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:39,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:39,692 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1907970402, now seen corresponding path program 1 times [2021-11-12 23:00:39,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:39,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921374888] [2021-11-12 23:00:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:39,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:39,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:39,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:39,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:00:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:40,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:00:40,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:00:40,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:40,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921374888] [2021-11-12 23:00:40,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921374888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:40,542 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:40,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:00:40,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136478463] [2021-11-12 23:00:40,542 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:00:40,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:00:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:00:40,544 INFO L87 Difference]: Start difference. First operand 691 states and 1101 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:00:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:40,630 INFO L93 Difference]: Finished difference Result 1347 states and 2150 transitions. [2021-11-12 23:00:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:40,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 96 [2021-11-12 23:00:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:40,638 INFO L225 Difference]: With dead ends: 1347 [2021-11-12 23:00:40,638 INFO L226 Difference]: Without dead ends: 641 [2021-11-12 23:00:40,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 188 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 23:00:40,644 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 23 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3969 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:40,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3969 Invalid, 38 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 53.93ms Time] [2021-11-12 23:00:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-12 23:00:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2021-11-12 23:00:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 499 states have (on average 1.591182364729459) internal successors, (794), 518 states have internal predecessors, (794), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-12 23:00:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1011 transitions. [2021-11-12 23:00:40,698 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1011 transitions. Word has length 96 [2021-11-12 23:00:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:40,699 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1011 transitions. [2021-11-12 23:00:40,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:00:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1011 transitions. [2021-11-12 23:00:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:00:40,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:40,703 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:00:40,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:40,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:40,926 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2126463325, now seen corresponding path program 1 times [2021-11-12 23:00:40,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:40,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904251671] [2021-11-12 23:00:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:40,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:40,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:40,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:00:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:00:41,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:00:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:00:41,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:41,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904251671] [2021-11-12 23:00:41,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904251671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:41,988 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:41,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:00:41,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698931010] [2021-11-12 23:00:41,989 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:41,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:00:41,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:00:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:00:41,991 INFO L87 Difference]: Start difference. First operand 641 states and 1011 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:00:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:42,199 INFO L93 Difference]: Finished difference Result 1308 states and 2055 transitions. [2021-11-12 23:00:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 98 [2021-11-12 23:00:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:42,206 INFO L225 Difference]: With dead ends: 1308 [2021-11-12 23:00:42,206 INFO L226 Difference]: Without dead ends: 638 [2021-11-12 23:00:42,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:00:42,211 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 134 mSDsluCounter, 2781 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3721 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.74ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:42,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3721 Invalid, 90 Unknown, 0 Unchecked, 4.74ms Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 160.61ms Time] [2021-11-12 23:00:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-12 23:00:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2021-11-12 23:00:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 496 states have (on average 1.5705645161290323) internal successors, (779), 514 states have internal predecessors, (779), 110 states have call successors, (110), 33 states have call predecessors, (110), 31 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-12 23:00:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 996 transitions. [2021-11-12 23:00:42,242 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 996 transitions. Word has length 98 [2021-11-12 23:00:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:42,242 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 996 transitions. [2021-11-12 23:00:42,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:00:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 996 transitions. [2021-11-12 23:00:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:00:42,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:42,246 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, 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 23:00:42,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:42,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:42,467 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash 738677365, now seen corresponding path program 1 times [2021-11-12 23:00:42,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:42,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409734539] [2021-11-12 23:00:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:42,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:42,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:42,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:42,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:00:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:43,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:00:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:00:43,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:00:44,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:44,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409734539] [2021-11-12 23:00:44,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409734539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:44,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:44,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:00:44,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920938525] [2021-11-12 23:00:44,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:44,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:00:44,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:00:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:00:44,199 INFO L87 Difference]: Start difference. First operand 638 states and 996 transitions. Second operand has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:00:46,242 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 23:00:48,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:50,256 WARN L515 Checker$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 23:01:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:02,914 INFO L93 Difference]: Finished difference Result 3240 states and 5258 transitions. [2021-11-12 23:01:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:01:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 115 [2021-11-12 23:01:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:02,939 INFO L225 Difference]: With dead ends: 3240 [2021-11-12 23:01:02,940 INFO L226 Difference]: Without dead ends: 2663 [2021-11-12 23:01:02,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:01:02,946 INFO L933 BasicCegarLoop]: 1768 mSDtfsCounter, 4622 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 7013 mSolverCounterSat, 1296 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16479.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4833 SdHoareTripleChecker+Valid, 3906 SdHoareTripleChecker+Invalid, 8312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.61ms SdHoareTripleChecker+Time, 1296 IncrementalHoareTripleChecker+Valid, 7013 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18243.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:02,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4833 Valid, 3906 Invalid, 8312 Unknown, 0 Unchecked, 68.61ms Time], IncrementalHoareTripleChecker [1296 Valid, 7013 Invalid, 3 Unknown, 0 Unchecked, 18243.31ms Time] [2021-11-12 23:01:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-11-12 23:01:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2414. [2021-11-12 23:01:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1866 states have (on average 1.6071811361200428) internal successors, (2999), 1925 states have internal predecessors, (2999), 444 states have call successors, (444), 103 states have call predecessors, (444), 103 states have return successors, (469), 412 states have call predecessors, (469), 439 states have call successors, (469) [2021-11-12 23:01:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3912 transitions. [2021-11-12 23:01:03,141 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3912 transitions. Word has length 115 [2021-11-12 23:01:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:03,142 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3912 transitions. [2021-11-12 23:01:03,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:01:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3912 transitions. [2021-11-12 23:01:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 23:01:03,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:03,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:01:03,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:03,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:03,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash -347895377, now seen corresponding path program 1 times [2021-11-12 23:01:03,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:03,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148977814] [2021-11-12 23:01:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:03,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:03,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:03,386 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:03,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:01:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:01:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:01:04,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-12 23:01:05,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:05,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148977814] [2021-11-12 23:01:05,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148977814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:05,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:01:05,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365089046] [2021-11-12 23:01:05,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:05,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:01:05,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:01:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:01:05,161 INFO L87 Difference]: Start difference. First operand 2414 states and 3912 transitions. Second operand has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 7 states have call successors, (41), 5 states have call predecessors, (41), 4 states have return successors, (39), 7 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 23:01:07,192 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 23:01:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:18,728 INFO L93 Difference]: Finished difference Result 6596 states and 10701 transitions. [2021-11-12 23:01:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:01:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 7 states have call successors, (41), 5 states have call predecessors, (41), 4 states have return successors, (39), 7 states have call predecessors, (39), 7 states have call successors, (39) Word has length 223 [2021-11-12 23:01:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:18,767 INFO L225 Difference]: With dead ends: 6596 [2021-11-12 23:01:18,768 INFO L226 Difference]: Without dead ends: 4243 [2021-11-12 23:01:18,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:01:18,789 INFO L933 BasicCegarLoop]: 1979 mSDtfsCounter, 2848 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 8740 mSolverCounterSat, 1066 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11528.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2934 SdHoareTripleChecker+Valid, 4074 SdHoareTripleChecker+Invalid, 9807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.49ms SdHoareTripleChecker+Time, 1066 IncrementalHoareTripleChecker+Valid, 8740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12957.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:18,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2934 Valid, 4074 Invalid, 9807 Unknown, 0 Unchecked, 57.49ms Time], IncrementalHoareTripleChecker [1066 Valid, 8740 Invalid, 1 Unknown, 0 Unchecked, 12957.17ms Time] [2021-11-12 23:01:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-11-12 23:01:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 4020. [2021-11-12 23:01:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 3084 states have (on average 1.5496108949416343) internal successors, (4779), 3160 states have internal predecessors, (4779), 764 states have call successors, (764), 164 states have call predecessors, (764), 171 states have return successors, (883), 728 states have call predecessors, (883), 755 states have call successors, (883) [2021-11-12 23:01:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 6426 transitions. [2021-11-12 23:01:19,129 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 6426 transitions. Word has length 223 [2021-11-12 23:01:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:19,130 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 6426 transitions. [2021-11-12 23:01:19,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 7 states have call successors, (41), 5 states have call predecessors, (41), 4 states have return successors, (39), 7 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 23:01:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 6426 transitions. [2021-11-12 23:01:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:01:19,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:19,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-11-12 23:01:19,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:19,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:19,354 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash -839637935, now seen corresponding path program 1 times [2021-11-12 23:01:19,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:19,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818734144] [2021-11-12 23:01:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:19,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:19,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:19,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:01:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:01:20,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:01:20,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:20,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818734144] [2021-11-12 23:01:20,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818734144] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:20,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:20,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:01:20,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794026820] [2021-11-12 23:01:20,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:20,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:01:20,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:01:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:01:20,838 INFO L87 Difference]: Start difference. First operand 4020 states and 6426 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:22,863 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 23:01:24,870 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 23:01:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:26,054 INFO L93 Difference]: Finished difference Result 8019 states and 13186 transitions. [2021-11-12 23:01:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:01:26,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 154 [2021-11-12 23:01:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:26,092 INFO L225 Difference]: With dead ends: 8019 [2021-11-12 23:01:26,092 INFO L226 Difference]: Without dead ends: 4060 [2021-11-12 23:01:26,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:01:26,117 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 887 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4820.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.25ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4966.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:26,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 2367 Invalid, 497 Unknown, 0 Unchecked, 6.25ms Time], IncrementalHoareTripleChecker [16 Valid, 479 Invalid, 2 Unknown, 0 Unchecked, 4966.01ms Time] [2021-11-12 23:01:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-11-12 23:01:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 4060. [2021-11-12 23:01:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 3114 states have (on average 1.5443159922928709) internal successors, (4809), 3190 states have internal predecessors, (4809), 764 states have call successors, (764), 174 states have call predecessors, (764), 181 states have return successors, (889), 728 states have call predecessors, (889), 755 states have call successors, (889) [2021-11-12 23:01:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6462 transitions. [2021-11-12 23:01:26,456 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6462 transitions. Word has length 154 [2021-11-12 23:01:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:26,457 INFO L470 AbstractCegarLoop]: Abstraction has 4060 states and 6462 transitions. [2021-11-12 23:01:26,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6462 transitions. [2021-11-12 23:01:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:01:26,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:26,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-12 23:01:26,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:26,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:26,691 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash 565699843, now seen corresponding path program 1 times [2021-11-12 23:01:26,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:26,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476665248] [2021-11-12 23:01:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:26,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:26,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:26,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:01:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:27,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:01:27,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:01:28,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:28,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476665248] [2021-11-12 23:01:28,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476665248] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:28,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:28,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:01:28,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626408994] [2021-11-12 23:01:28,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:28,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:01:28,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:28,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:01:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:01:28,230 INFO L87 Difference]: Start difference. First operand 4060 states and 6462 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:30,275 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 23:01:32,283 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 23:01:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:33,365 INFO L93 Difference]: Finished difference Result 8109 states and 13249 transitions. [2021-11-12 23:01:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:01:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 156 [2021-11-12 23:01:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:33,392 INFO L225 Difference]: With dead ends: 8109 [2021-11-12 23:01:33,392 INFO L226 Difference]: Without dead ends: 4110 [2021-11-12 23:01:33,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:01:33,408 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 872 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4777.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.62ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4924.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:33,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 2368 Invalid, 499 Unknown, 0 Unchecked, 5.62ms Time], IncrementalHoareTripleChecker [14 Valid, 483 Invalid, 2 Unknown, 0 Unchecked, 4924.66ms Time] [2021-11-12 23:01:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-11-12 23:01:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 4110. [2021-11-12 23:01:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4110 states, 3154 states have (on average 1.537412809131262) internal successors, (4849), 3230 states have internal predecessors, (4849), 764 states have call successors, (764), 184 states have call predecessors, (764), 191 states have return successors, (895), 728 states have call predecessors, (895), 755 states have call successors, (895) [2021-11-12 23:01:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 6508 transitions. [2021-11-12 23:01:33,744 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 6508 transitions. Word has length 156 [2021-11-12 23:01:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:33,745 INFO L470 AbstractCegarLoop]: Abstraction has 4110 states and 6508 transitions. [2021-11-12 23:01:33,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 6508 transitions. [2021-11-12 23:01:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:01:33,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:33,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:01:33,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:33,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:33,974 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1903647889, now seen corresponding path program 1 times [2021-11-12 23:01:33,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:33,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580692664] [2021-11-12 23:01:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:33,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:33,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:33,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:01:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:01:34,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:01:35,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:35,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580692664] [2021-11-12 23:01:35,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580692664] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:35,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:35,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:01:35,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535386166] [2021-11-12 23:01:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:35,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:01:35,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:01:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:01:35,416 INFO L87 Difference]: Start difference. First operand 4110 states and 6508 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:37,438 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 23:01:39,444 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 23:01:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:40,616 INFO L93 Difference]: Finished difference Result 8219 states and 13332 transitions. [2021-11-12 23:01:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:01:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 158 [2021-11-12 23:01:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:40,650 INFO L225 Difference]: With dead ends: 8219 [2021-11-12 23:01:40,650 INFO L226 Difference]: Without dead ends: 4170 [2021-11-12 23:01:40,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:01:40,675 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 873 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4818.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.02ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4959.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:40,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 2368 Invalid, 498 Unknown, 0 Unchecked, 6.02ms Time], IncrementalHoareTripleChecker [12 Valid, 484 Invalid, 2 Unknown, 0 Unchecked, 4959.15ms Time] [2021-11-12 23:01:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-11-12 23:01:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4170. [2021-11-12 23:01:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4170 states, 3204 states have (on average 1.5290262172284643) internal successors, (4899), 3280 states have internal predecessors, (4899), 764 states have call successors, (764), 194 states have call predecessors, (764), 201 states have return successors, (901), 728 states have call predecessors, (901), 755 states have call successors, (901) [2021-11-12 23:01:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 6564 transitions. [2021-11-12 23:01:40,963 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 6564 transitions. Word has length 158 [2021-11-12 23:01:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:40,964 INFO L470 AbstractCegarLoop]: Abstraction has 4170 states and 6564 transitions. [2021-11-12 23:01:40,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 6564 transitions. [2021-11-12 23:01:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:01:40,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:40,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:01:41,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:41,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:41,199 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:41,199 INFO L85 PathProgramCache]: Analyzing trace with hash -947230133, now seen corresponding path program 1 times [2021-11-12 23:01:41,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:41,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737601259] [2021-11-12 23:01:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:41,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:41,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:41,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:01:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:01:42,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:01:42,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:42,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737601259] [2021-11-12 23:01:42,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737601259] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:01:42,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:01:42,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:01:42,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705813709] [2021-11-12 23:01:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:42,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:01:42,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:01:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:01:42,782 INFO L87 Difference]: Start difference. First operand 4170 states and 6564 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:44,805 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 23:01:46,810 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 23:01:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:47,965 INFO L93 Difference]: Finished difference Result 8349 states and 13435 transitions. [2021-11-12 23:01:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:01:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 160 [2021-11-12 23:01:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:47,996 INFO L225 Difference]: With dead ends: 8349 [2021-11-12 23:01:47,996 INFO L226 Difference]: Without dead ends: 4240 [2021-11-12 23:01:48,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 311 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 23:01:48,021 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 877 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4859.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.44ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4991.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:48,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 2368 Invalid, 497 Unknown, 0 Unchecked, 6.44ms Time], IncrementalHoareTripleChecker [10 Valid, 485 Invalid, 2 Unknown, 0 Unchecked, 4991.09ms Time] [2021-11-12 23:01:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-11-12 23:01:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 4240. [2021-11-12 23:01:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 3264 states have (on average 1.5193014705882353) internal successors, (4959), 3340 states have internal predecessors, (4959), 764 states have call successors, (764), 204 states have call predecessors, (764), 211 states have return successors, (907), 728 states have call predecessors, (907), 755 states have call successors, (907) [2021-11-12 23:01:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 6630 transitions. [2021-11-12 23:01:48,328 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 6630 transitions. Word has length 160 [2021-11-12 23:01:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 6630 transitions. [2021-11-12 23:01:48,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:01:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 6630 transitions. [2021-11-12 23:01:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 23:01:48,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:48,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:01:48,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:48,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:48,562 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:48,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1057449681, now seen corresponding path program 1 times [2021-11-12 23:01:48,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:48,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210031362] [2021-11-12 23:01:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:48,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:48,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:48,564 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:48,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:01:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:01:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:01:49,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:01:50,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:50,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210031362] [2021-11-12 23:01:50,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210031362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:01:50,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80527156] [2021-11-12 23:01:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:50,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:01:50,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:01:50,970 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:01:50,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:01:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:01:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:01:51,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:01:52,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80527156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:01:52,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743923037] [2021-11-12 23:01:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:52,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:01:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:01:52,792 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:01:52,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 23:01:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:01:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:01:53,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:01:54,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743923037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:01:54,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:01:54,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:01:54,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918181045] [2021-11-12 23:01:54,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:01:54,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:01:54,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:01:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:01:54,387 INFO L87 Difference]: Start difference. First operand 4240 states and 6630 transitions. Second operand has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 23:01:56,409 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 23:01:58,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:00,421 WARN L515 Checker$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 23:02:02,427 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 23:02:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:15,991 INFO L93 Difference]: Finished difference Result 14519 states and 23502 transitions. [2021-11-12 23:02:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:02:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) Word has length 162 [2021-11-12 23:02:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:16,056 INFO L225 Difference]: With dead ends: 14519 [2021-11-12 23:02:16,056 INFO L226 Difference]: Without dead ends: 10340 [2021-11-12 23:02:16,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:02:16,091 INFO L933 BasicCegarLoop]: 1912 mSDtfsCounter, 7385 mSDsluCounter, 4567 mSDsCounter, 0 mSdLazyCounter, 10031 mSolverCounterSat, 2917 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19135.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7474 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 12952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.89ms SdHoareTripleChecker+Time, 2917 IncrementalHoareTripleChecker+Valid, 10031 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20743.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:16,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7474 Valid, 6479 Invalid, 12952 Unknown, 0 Unchecked, 57.89ms Time], IncrementalHoareTripleChecker [2917 Valid, 10031 Invalid, 4 Unknown, 0 Unchecked, 20743.65ms Time] [2021-11-12 23:02:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10340 states. [2021-11-12 23:02:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10340 to 8984. [2021-11-12 23:02:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 6823 states have (on average 1.5153158434706142) internal successors, (10339), 6999 states have internal predecessors, (10339), 1689 states have call successors, (1689), 405 states have call predecessors, (1689), 471 states have return successors, (2194), 1660 states have call predecessors, (2194), 1673 states have call successors, (2194) [2021-11-12 23:02:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 14222 transitions. [2021-11-12 23:02:16,991 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 14222 transitions. Word has length 162 [2021-11-12 23:02:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:16,992 INFO L470 AbstractCegarLoop]: Abstraction has 8984 states and 14222 transitions. [2021-11-12 23:02:16,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 23:02:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 14222 transitions. [2021-11-12 23:02:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:02:17,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:17,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:02:17,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-12 23:02:17,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:17,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:17,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:02:17,614 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1352611735, now seen corresponding path program 1 times [2021-11-12 23:02:17,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:17,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050346638] [2021-11-12 23:02:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:17,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:17,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:17,618 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:17,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:02:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:02:18,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:02:18,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:02:19,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:19,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050346638] [2021-11-12 23:02:19,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050346638] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:02:19,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:02:19,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-12 23:02:19,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013196564] [2021-11-12 23:02:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:19,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:02:19,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:02:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:02:19,155 INFO L87 Difference]: Start difference. First operand 8984 states and 14222 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:02:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:19,947 INFO L93 Difference]: Finished difference Result 17667 states and 28039 transitions. [2021-11-12 23:02:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:02:19,948 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 163 [2021-11-12 23:02:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:20,002 INFO L225 Difference]: With dead ends: 17667 [2021-11-12 23:02:20,002 INFO L226 Difference]: Without dead ends: 8710 [2021-11-12 23:02:20,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 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 23:02:20,041 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 62 mSDsluCounter, 5538 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6470 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.58ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:20,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6470 Invalid, 172 Unknown, 0 Unchecked, 9.58ms Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 217.81ms Time] [2021-11-12 23:02:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-11-12 23:02:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 8689. [2021-11-12 23:02:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 6587 states have (on average 1.5257325034158191) internal successors, (10050), 6762 states have internal predecessors, (10050), 1655 states have call successors, (1655), 381 states have call predecessors, (1655), 446 states have return successors, (2098), 1626 states have call predecessors, (2098), 1639 states have call successors, (2098) [2021-11-12 23:02:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 13803 transitions. [2021-11-12 23:02:20,759 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 13803 transitions. Word has length 163 [2021-11-12 23:02:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:20,760 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 13803 transitions. [2021-11-12 23:02:20,767 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:02:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 13803 transitions. [2021-11-12 23:02:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:02:20,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:20,780 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, 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] [2021-11-12 23:02:20,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:21,004 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1322357360, now seen corresponding path program 1 times [2021-11-12 23:02:21,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:21,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053633486] [2021-11-12 23:02:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:21,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:21,008 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:21,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:02:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:02:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:02:22,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:02:23,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:23,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053633486] [2021-11-12 23:02:23,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053633486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:23,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1268734048] [2021-11-12 23:02:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:23,381 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:02:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:02:23,390 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:02:23,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:02:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:02:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:02:24,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:02:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1268734048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:25,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62993611] [2021-11-12 23:02:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:25,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:02:25,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:02:25,599 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:02:25,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-12 23:02:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:02:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:02:26,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:02:27,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62993611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:27,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:02:27,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:02:27,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843526221] [2021-11-12 23:02:27,372 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:02:27,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:02:27,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:27,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:02:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:02:27,375 INFO L87 Difference]: Start difference. First operand 8689 states and 13803 transitions. Second operand has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 23:02:29,411 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 23:02:31,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:33,424 WARN L515 Checker$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 23:02:35,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:37,436 WARN L515 Checker$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 23:02:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:47,914 INFO L93 Difference]: Finished difference Result 22333 states and 36201 transitions. [2021-11-12 23:02:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:02:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) Word has length 170 [2021-11-12 23:02:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:48,012 INFO L225 Difference]: With dead ends: 22333 [2021-11-12 23:02:48,012 INFO L226 Difference]: Without dead ends: 13704 [2021-11-12 23:02:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:02:48,071 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 4437 mSDsluCounter, 3738 mSDsCounter, 0 mSdLazyCounter, 8144 mSolverCounterSat, 1369 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18290.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4517 SdHoareTripleChecker+Valid, 5501 SdHoareTripleChecker+Invalid, 9518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.97ms SdHoareTripleChecker+Time, 1369 IncrementalHoareTripleChecker+Valid, 8144 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19542.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:48,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4517 Valid, 5501 Invalid, 9518 Unknown, 0 Unchecked, 43.97ms Time], IncrementalHoareTripleChecker [1369 Valid, 8144 Invalid, 5 Unknown, 0 Unchecked, 19542.02ms Time] [2021-11-12 23:02:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13704 states. [2021-11-12 23:02:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13704 to 13110. [2021-11-12 23:02:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13110 states, 9888 states have (on average 1.5271035598705502) internal successors, (15100), 10150 states have internal predecessors, (15100), 2546 states have call successors, (2546), 558 states have call predecessors, (2546), 675 states have return successors, (3279), 2530 states have call predecessors, (3279), 2523 states have call successors, (3279) [2021-11-12 23:02:49,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13110 states to 13110 states and 20925 transitions. [2021-11-12 23:02:49,151 INFO L78 Accepts]: Start accepts. Automaton has 13110 states and 20925 transitions. Word has length 170 [2021-11-12 23:02:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:49,152 INFO L470 AbstractCegarLoop]: Abstraction has 13110 states and 20925 transitions. [2021-11-12 23:02:49,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 23:02:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 13110 states and 20925 transitions. [2021-11-12 23:02:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 23:02:49,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:49,160 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, 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] [2021-11-12 23:02:49,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:49,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:49,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:49,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:02:49,774 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash -836806944, now seen corresponding path program 1 times [2021-11-12 23:02:49,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:49,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951286645] [2021-11-12 23:02:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:49,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:49,779 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:49,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:02:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:02:50,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:02:50,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:02:51,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951286645] [2021-11-12 23:02:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951286645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136018172] [2021-11-12 23:02:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:51,695 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:02:51,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:02:51,697 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:02:51,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 23:02:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:52,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:02:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:02:52,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:02:53,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136018172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:53,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996705051] [2021-11-12 23:02:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:53,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:02:53,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:02:53,287 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:02:53,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-12 23:02:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:02:53,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:02:53,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:02:54,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996705051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:54,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:02:54,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:02:54,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183421852] [2021-11-12 23:02:54,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:02:54,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:02:54,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:54,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:02:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:02:54,498 INFO L87 Difference]: Start difference. First operand 13110 states and 20925 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 23:02:56,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:58,537 WARN L515 Checker$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 23:03:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:10,921 INFO L93 Difference]: Finished difference Result 49490 states and 81640 transitions. [2021-11-12 23:03:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:03:10,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) Word has length 171 [2021-11-12 23:03:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:11,225 INFO L225 Difference]: With dead ends: 49490 [2021-11-12 23:03:11,234 INFO L226 Difference]: Without dead ends: 36404 [2021-11-12 23:03:11,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:03:11,362 INFO L933 BasicCegarLoop]: 1701 mSDtfsCounter, 5733 mSDsluCounter, 2664 mSDsCounter, 0 mSdLazyCounter, 7082 mSolverCounterSat, 1765 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12571.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5846 SdHoareTripleChecker+Valid, 4365 SdHoareTripleChecker+Invalid, 8849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.31ms SdHoareTripleChecker+Time, 1765 IncrementalHoareTripleChecker+Valid, 7082 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14005.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:11,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5846 Valid, 4365 Invalid, 8849 Unknown, 0 Unchecked, 51.31ms Time], IncrementalHoareTripleChecker [1765 Valid, 7082 Invalid, 2 Unknown, 0 Unchecked, 14005.86ms Time] [2021-11-12 23:03:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36404 states. [2021-11-12 23:03:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36404 to 32080. [2021-11-12 23:03:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32080 states, 24238 states have (on average 1.5069725224853536) internal successors, (36526), 24847 states have internal predecessors, (36526), 6038 states have call successors, (6038), 1554 states have call predecessors, (6038), 1803 states have return successors, (8530), 5979 states have call predecessors, (8530), 5991 states have call successors, (8530) [2021-11-12 23:03:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32080 states to 32080 states and 51094 transitions. [2021-11-12 23:03:14,308 INFO L78 Accepts]: Start accepts. Automaton has 32080 states and 51094 transitions. Word has length 171 [2021-11-12 23:03:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 32080 states and 51094 transitions. [2021-11-12 23:03:14,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 23:03:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 32080 states and 51094 transitions. [2021-11-12 23:03:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 23:03:14,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:14,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:03:14,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:14,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:14,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:14,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:03:14,930 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1586380235, now seen corresponding path program 1 times [2021-11-12 23:03:14,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:14,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905509505] [2021-11-12 23:03:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:14,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:14,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:14,933 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:14,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:03:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:03:15,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:03:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:03:21,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:21,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905509505] [2021-11-12 23:03:21,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905509505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:21,667 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:21,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 23:03:21,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960554468] [2021-11-12 23:03:21,667 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:21,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:03:21,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:03:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:03:21,669 INFO L87 Difference]: Start difference. First operand 32080 states and 51094 transitions. Second operand has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-12 23:03:23,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:25,698 WARN L515 Checker$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 23:03:27,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:29,709 WARN L515 Checker$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 23:03:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:47,767 INFO L93 Difference]: Finished difference Result 96188 states and 159781 transitions. [2021-11-12 23:03:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:03:47,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 173 [2021-11-12 23:03:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:48,249 INFO L225 Difference]: With dead ends: 96188 [2021-11-12 23:03:48,249 INFO L226 Difference]: Without dead ends: 64144 [2021-11-12 23:03:48,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:03:48,791 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 6862 mSDsluCounter, 2288 mSDsCounter, 0 mSdLazyCounter, 7047 mSolverCounterSat, 1892 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18866.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7073 SdHoareTripleChecker+Valid, 4051 SdHoareTripleChecker+Invalid, 8943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.51ms SdHoareTripleChecker+Time, 1892 IncrementalHoareTripleChecker+Valid, 7047 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20478.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:48,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7073 Valid, 4051 Invalid, 8943 Unknown, 0 Unchecked, 49.51ms Time], IncrementalHoareTripleChecker [1892 Valid, 7047 Invalid, 4 Unknown, 0 Unchecked, 20478.03ms Time] [2021-11-12 23:03:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64144 states. [2021-11-12 23:03:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64144 to 54458. [2021-11-12 23:03:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54458 states, 40328 states have (on average 1.496652449910732) internal successors, (60357), 41562 states have internal predecessors, (60357), 11165 states have call successors, (11165), 2556 states have call predecessors, (11165), 2964 states have return successors, (15591), 10941 states have call predecessors, (15591), 11097 states have call successors, (15591) [2021-11-12 23:03:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54458 states to 54458 states and 87113 transitions. [2021-11-12 23:03:53,716 INFO L78 Accepts]: Start accepts. Automaton has 54458 states and 87113 transitions. Word has length 173 [2021-11-12 23:03:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:53,717 INFO L470 AbstractCegarLoop]: Abstraction has 54458 states and 87113 transitions. [2021-11-12 23:03:53,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-12 23:03:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54458 states and 87113 transitions. [2021-11-12 23:03:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 23:03:53,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:53,723 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:53,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:53,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:53,942 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1877409134, now seen corresponding path program 1 times [2021-11-12 23:03:53,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:53,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923689328] [2021-11-12 23:03:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:53,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:53,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:53,944 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:53,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:03:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:54,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:03:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:03:55,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:03:55,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:55,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923689328] [2021-11-12 23:03:55,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923689328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:55,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:55,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:03:55,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277600909] [2021-11-12 23:03:55,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:55,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:03:55,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:03:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:03:55,804 INFO L87 Difference]: Start difference. First operand 54458 states and 87113 transitions. Second operand has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-12 23:03:57,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:59,831 WARN L515 Checker$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 23:04:01,837 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 23:04:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:26,324 INFO L93 Difference]: Finished difference Result 176953 states and 312066 transitions. [2021-11-12 23:04:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:04:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) Word has length 177 [2021-11-12 23:04:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:27,727 INFO L225 Difference]: With dead ends: 176953 [2021-11-12 23:04:27,727 INFO L226 Difference]: Without dead ends: 122447 [2021-11-12 23:04:28,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 341 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 23:04:28,372 INFO L933 BasicCegarLoop]: 1799 mSDtfsCounter, 3318 mSDsluCounter, 3060 mSDsCounter, 0 mSdLazyCounter, 10515 mSolverCounterSat, 1065 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16996.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 4859 SdHoareTripleChecker+Invalid, 11583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.49ms SdHoareTripleChecker+Time, 1065 IncrementalHoareTripleChecker+Valid, 10515 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18563.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:28,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3439 Valid, 4859 Invalid, 11583 Unknown, 0 Unchecked, 56.49ms Time], IncrementalHoareTripleChecker [1065 Valid, 10515 Invalid, 3 Unknown, 0 Unchecked, 18563.69ms Time] [2021-11-12 23:04:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122447 states. [2021-11-12 23:04:36,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122447 to 102861. [2021-11-12 23:04:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102861 states, 74234 states have (on average 1.4771937387181076) internal successors, (109658), 77103 states have internal predecessors, (109658), 23083 states have call successors, (23083), 4261 states have call predecessors, (23083), 5543 states have return successors, (34253), 23050 states have call predecessors, (34253), 22970 states have call successors, (34253) [2021-11-12 23:04:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102861 states to 102861 states and 166994 transitions. [2021-11-12 23:04:38,235 INFO L78 Accepts]: Start accepts. Automaton has 102861 states and 166994 transitions. Word has length 177 [2021-11-12 23:04:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:38,236 INFO L470 AbstractCegarLoop]: Abstraction has 102861 states and 166994 transitions. [2021-11-12 23:04:38,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-12 23:04:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 102861 states and 166994 transitions. [2021-11-12 23:04:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 23:04:38,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:38,243 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:38,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:38,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:38,462 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -33633424, now seen corresponding path program 1 times [2021-11-12 23:04:38,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:38,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940456365] [2021-11-12 23:04:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:38,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:38,464 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:38,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2acae24-4488-451d-8c2c-fd673dac374a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:04:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:04:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:04:39,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:04:41,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:41,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940456365] [2021-11-12 23:04:41,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940456365] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:41,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:41,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-12 23:04:41,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479888756] [2021-11-12 23:04:41,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:41,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:04:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:04:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:04:41,173 INFO L87 Difference]: Start difference. First operand 102861 states and 166994 transitions. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 23:04:43,195 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 23:04:45,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:47,208 WARN L515 Checker$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 23:04:49,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:51,221 WARN L515 Checker$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 23:04:53,227 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 23:05:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:07,887 INFO L93 Difference]: Finished difference Result 194422 states and 317973 transitions. [2021-11-12 23:05:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:05:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 177 [2021-11-12 23:05:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:09,067 INFO L225 Difference]: With dead ends: 194422 [2021-11-12 23:05:09,067 INFO L226 Difference]: Without dead ends: 104900 [2021-11-12 23:05:09,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:05:09,733 INFO L933 BasicCegarLoop]: 1868 mSDtfsCounter, 3123 mSDsluCounter, 5554 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 670 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16548.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3131 SdHoareTripleChecker+Valid, 7422 SdHoareTripleChecker+Invalid, 3946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.13ms SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17274.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:09,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3131 Valid, 7422 Invalid, 3946 Unknown, 0 Unchecked, 32.13ms Time], IncrementalHoareTripleChecker [670 Valid, 3270 Invalid, 6 Unknown, 0 Unchecked, 17274.80ms Time] [2021-11-12 23:05:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104900 states.