./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:36:43,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:36:43,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:36:43,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:36:43,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:36:43,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:36:43,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:36:43,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:36:43,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:36:43,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:36:43,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:36:43,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:36:43,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:36:43,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:36:43,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:36:43,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:36:43,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:36:43,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:36:43,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:36:43,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:36:43,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:36:44,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:36:44,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:36:44,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:36:44,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:36:44,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:36:44,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:36:44,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:36:44,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:36:44,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:36:44,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:36:44,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:36:44,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:36:44,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:36:44,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:36:44,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:36:44,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:36:44,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:36:44,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:36:44,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:36:44,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:36:44,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:36:44,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:36:44,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:36:44,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:36:44,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:36:44,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:36:44,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:36:44,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:36:44,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:36:44,098 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:36:44,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:36:44,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:36:44,100 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:36:44,100 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:36:44,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:36:44,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:36:44,101 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:36:44,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:36:44,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:36:44,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:36:44,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:36:44,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:36:44,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:36:44,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:36:44,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:36:44,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:36:44,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:36:44,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:36:44,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:36:44,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:36:44,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:36:44,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:36:44,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:36:44,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:36:44,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:36:44,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:36:44,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:36:44,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:36:44,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:36:44,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:36:44,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:36:44,112 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-13 01:36:44,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:36:44,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:36:44,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:36:44,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:36:44,392 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:36:44,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-13 01:36:44,467 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/219f43344/1296c262f91548c1b2fc6f396aab01ee/FLAGe9cca949d [2021-11-13 01:36:45,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:36:45,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-13 01:36:45,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/219f43344/1296c262f91548c1b2fc6f396aab01ee/FLAGe9cca949d [2021-11-13 01:36:45,361 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/219f43344/1296c262f91548c1b2fc6f396aab01ee [2021-11-13 01:36:45,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:36:45,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:36:45,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:45,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:36:45,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:36:45,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:45" (1/1) ... [2021-11-13 01:36:45,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d90f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:45, skipping insertion in model container [2021-11-13 01:36:45,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:45" (1/1) ... [2021-11-13 01:36:45,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:36:45,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:36:45,959 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-13 01:36:46,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:46,046 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) [2021-11-13 01:36:46,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7084aa6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:46, skipping insertion in model container [2021-11-13 01:36:46,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:46,050 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:36:46,052 INFO L158 Benchmark]: Toolchain (without parser) took 686.00ms. Allocated memory is still 104.9MB. Free memory was 70.0MB in the beginning and 66.2MB in the end (delta: 3.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-13 01:36:46,053 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:36:46,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 677.19ms. Allocated memory is still 104.9MB. Free memory was 69.9MB in the beginning and 66.2MB in the end (delta: 3.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-13 01:36:46,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 677.19ms. Allocated memory is still 104.9MB. Free memory was 69.9MB in the beginning and 66.2MB in the end (delta: 3.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2979]: 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:36:48,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:36:48,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:36:48,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:36:48,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:36:48,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:36:48,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:36:48,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:36:48,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:36:48,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:36:48,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:36:48,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:36:48,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:36:48,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:36:48,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:36:48,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:36:48,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:36:48,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:36:48,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:36:48,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:36:48,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:36:48,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:36:48,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:36:48,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:36:48,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:36:48,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:36:48,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:36:48,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:36:48,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:36:48,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:36:48,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:36:48,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:36:48,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:36:48,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:36:48,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:36:48,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:36:48,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:36:48,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:36:48,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:36:48,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:36:48,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:36:48,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:36:48,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:36:48,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:36:48,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:36:48,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:36:48,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:36:48,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:36:48,520 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:36:48,520 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:36:48,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:36:48,520 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:36:48,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:36:48,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:36:48,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:36:48,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:36:48,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:36:48,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:36:48,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:36:48,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:36:48,523 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:36:48,523 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:36:48,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:36:48,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:36:48,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:36:48,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:36:48,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:36:48,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:36:48,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:36:48,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:36:48,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:36:48,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:36:48,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:36:48,525 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:36:48,526 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:48,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:36:48,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:36:48,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:36:48,527 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2021-11-13 01:36:48,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:36:48,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:36:48,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:36:48,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:36:48,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:36:48,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-13 01:36:49,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/75ce3d3a3/88305de928a74bfcad35805482db7a8a/FLAG66dbba757 [2021-11-13 01:36:49,806 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:36:49,808 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2021-11-13 01:36:49,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/75ce3d3a3/88305de928a74bfcad35805482db7a8a/FLAG66dbba757 [2021-11-13 01:36:49,912 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/data/75ce3d3a3/88305de928a74bfcad35805482db7a8a [2021-11-13 01:36:49,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:36:49,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:36:49,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:49,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:36:49,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:36:49,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:49" (1/1) ... [2021-11-13 01:36:49,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b596e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:49, skipping insertion in model container [2021-11-13 01:36:49,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:49" (1/1) ... [2021-11-13 01:36:49,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:36:50,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:36:50,686 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-13 01:36:50,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:50,791 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:36:50,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:36:50,968 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-13 01:36:50,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:51,012 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:36:51,122 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_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2021-11-13 01:36:51,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:51,175 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:36:51,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51 WrapperNode [2021-11-13 01:36:51,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:51,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:36:51,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:36:51,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:36:51,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:36:51,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:36:51,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:36:51,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:36:51,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:36:51,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:36:51,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:36:51,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:36:51,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (1/1) ... [2021-11-13 01:36:51,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:36:51,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:51,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:36:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:36:51,561 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 01:36:51,562 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 01:36:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-13 01:36:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-13 01:36:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 01:36:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 01:36:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-13 01:36:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-13 01:36:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:36:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 01:36:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 01:36:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 01:36:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 01:36:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 01:36:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 01:36:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 01:36:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 01:36:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 01:36:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 01:36:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 01:36:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 01:36:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 01:36:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 01:36:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 01:36:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 01:36:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 01:36:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 01:36:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 01:36:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 01:36:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:36:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 01:36:51,568 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 01:36:51,568 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 01:36:51,568 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 01:36:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 01:36:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 01:36:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 01:36:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 01:36:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 01:36:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 01:36:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-13 01:36:51,570 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-13 01:36:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 01:36:51,570 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 01:36:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 01:36:51,571 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 01:36:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 01:36:51,571 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 01:36:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-13 01:36:51,572 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-13 01:36:51,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:36:51,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:36:51,575 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 01:36:51,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 01:36:55,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:36:55,668 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-13 01:36:55,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:55 BoogieIcfgContainer [2021-11-13 01:36:55,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:36:55,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:36:55,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:36:55,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:36:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:36:49" (1/3) ... [2021-11-13 01:36:55,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625b68d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:55, skipping insertion in model container [2021-11-13 01:36:55,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:51" (2/3) ... [2021-11-13 01:36:55,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625b68d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:55, skipping insertion in model container [2021-11-13 01:36:55,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:55" (3/3) ... [2021-11-13 01:36:55,691 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2021-11-13 01:36:55,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:36:55,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:36:55,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:36:55,780 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 [2021-11-13 01:36:55,781 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:36:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 592 states, 465 states have (on average 1.6924731182795698) internal successors, (787), 483 states have internal predecessors, (787), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-13 01:36:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:36:55,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:55,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:55,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash -525274672, now seen corresponding path program 1 times [2021-11-13 01:36:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:55,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159774899] [2021-11-13 01:36:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:55,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:55,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:55,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:55,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:36:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:36:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:36:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:36:57,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:57,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159774899] [2021-11-13 01:36:57,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159774899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:57,275 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:57,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:36:57,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806517645] [2021-11-13 01:36:57,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:57,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:36:57,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:36:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:36:57,328 INFO L87 Difference]: Start difference. First operand has 592 states, 465 states have (on average 1.6924731182795698) internal successors, (787), 483 states have internal predecessors, (787), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:36:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:57,499 INFO L93 Difference]: Finished difference Result 1162 states and 1957 transitions. [2021-11-13 01:36:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:36:57,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 114 [2021-11-13 01:36:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:57,535 INFO L225 Difference]: With dead ends: 1162 [2021-11-13 01:36:57,535 INFO L226 Difference]: Without dead ends: 582 [2021-11-13 01:36:57,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:36:57,556 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:57,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 20.19ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:36:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-13 01:36:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-13 01:36:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 458 states have (on average 1.6746724890829694) internal successors, (767), 474 states have internal predecessors, (767), 100 states have call successors, (100), 25 states have call predecessors, (100), 23 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:36:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 964 transitions. [2021-11-13 01:36:57,709 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 964 transitions. Word has length 114 [2021-11-13 01:36:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:57,711 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 964 transitions. [2021-11-13 01:36:57,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:36:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 964 transitions. [2021-11-13 01:36:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:36:57,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:57,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:57,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:57,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:57,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash 281689968, now seen corresponding path program 1 times [2021-11-13 01:36:57,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:57,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278635594] [2021-11-13 01:36:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:57,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:57,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:57,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:36:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:36:58,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:36:59,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:59,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278635594] [2021-11-13 01:36:59,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278635594] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:59,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:36:59,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:36:59,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934577316] [2021-11-13 01:36:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:59,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:36:59,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:36:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:59,231 INFO L87 Difference]: Start difference. First operand 582 states and 964 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:36:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:59,366 INFO L93 Difference]: Finished difference Result 1160 states and 1928 transitions. [2021-11-13 01:36:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2021-11-13 01:36:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:59,374 INFO L225 Difference]: With dead ends: 1160 [2021-11-13 01:36:59,374 INFO L226 Difference]: Without dead ends: 586 [2021-11-13 01:36:59,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:36:59,381 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 15 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.86ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:59,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2838 Invalid, 43 Unknown, 0 Unchecked, 11.86ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 56.05ms Time] [2021-11-13 01:36:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-13 01:36:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-13 01:36:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 477 states have internal predecessors, (770), 100 states have call successors, (100), 26 states have call predecessors, (100), 24 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:36:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 967 transitions. [2021-11-13 01:36:59,431 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 967 transitions. Word has length 114 [2021-11-13 01:36:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 967 transitions. [2021-11-13 01:36:59,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:36:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 967 transitions. [2021-11-13 01:36:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:36:59,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:59,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:59,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:59,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:59,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1996051294, now seen corresponding path program 1 times [2021-11-13 01:36:59,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:59,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286649362] [2021-11-13 01:36:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:59,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:59,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:59,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:37:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:00,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:01,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:01,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286649362] [2021-11-13 01:37:01,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286649362] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:01,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:01,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:37:01,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250792322] [2021-11-13 01:37:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:01,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:01,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:37:01,052 INFO L87 Difference]: Start difference. First operand 586 states and 967 transitions. Second operand has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:01,380 INFO L93 Difference]: Finished difference Result 1184 states and 1959 transitions. [2021-11-13 01:37:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2021-11-13 01:37:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:01,389 INFO L225 Difference]: With dead ends: 1184 [2021-11-13 01:37:01,389 INFO L226 Difference]: Without dead ends: 608 [2021-11-13 01:37:01,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:01,395 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 119 mSDsluCounter, 4701 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5663 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:01,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5663 Invalid, 98 Unknown, 0 Unchecked, 17.34ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 226.61ms Time] [2021-11-13 01:37:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-13 01:37:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 599. [2021-11-13 01:37:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 489 states have internal predecessors, (785), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-13 01:37:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2021-11-13 01:37:01,440 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 116 [2021-11-13 01:37:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:01,440 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2021-11-13 01:37:01,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2021-11-13 01:37:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:37:01,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:01,448 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:37:01,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:01,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:01,663 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1453039279, now seen corresponding path program 1 times [2021-11-13 01:37:01,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:01,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16416632] [2021-11-13 01:37:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:01,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:01,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:01,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:01,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:37:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:02,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:02,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16416632] [2021-11-13 01:37:02,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16416632] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:02,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:02,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:37:02,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672605833] [2021-11-13 01:37:02,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:02,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:02,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:37:02,955 INFO L87 Difference]: Start difference. First operand 599 states and 989 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:03,341 INFO L93 Difference]: Finished difference Result 1204 states and 1992 transitions. [2021-11-13 01:37:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:03,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-11-13 01:37:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:03,349 INFO L225 Difference]: With dead ends: 1204 [2021-11-13 01:37:03,349 INFO L226 Difference]: Without dead ends: 617 [2021-11-13 01:37:03,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:03,355 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 105 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5677 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.39ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:03,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5677 Invalid, 120 Unknown, 0 Unchecked, 14.72ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 306.39ms Time] [2021-11-13 01:37:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-13 01:37:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 599. [2021-11-13 01:37:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 489 states have internal predecessors, (785), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-13 01:37:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2021-11-13 01:37:03,396 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 117 [2021-11-13 01:37:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:03,397 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2021-11-13 01:37:03,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2021-11-13 01:37:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:37:03,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:03,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:03,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:03,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:03,633 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash 819662083, now seen corresponding path program 1 times [2021-11-13 01:37:03,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:03,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37683198] [2021-11-13 01:37:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:03,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:03,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:03,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:37:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:37:04,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:37:04,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:04,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37683198] [2021-11-13 01:37:04,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37683198] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:04,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:04,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 01:37:04,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117441577] [2021-11-13 01:37:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:04,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:37:04,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:37:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:37:04,712 INFO L87 Difference]: Start difference. First operand 599 states and 989 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:37:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:04,818 INFO L93 Difference]: Finished difference Result 1189 states and 1967 transitions. [2021-11-13 01:37:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-13 01:37:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:04,824 INFO L225 Difference]: With dead ends: 1189 [2021-11-13 01:37:04,825 INFO L226 Difference]: Without dead ends: 600 [2021-11-13 01:37:04,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:04,832 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 22 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.96ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:04,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2838 Invalid, 36 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 51.96ms Time] [2021-11-13 01:37:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-13 01:37:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2021-11-13 01:37:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 473 states have (on average 1.6659619450317125) internal successors, (788), 490 states have internal predecessors, (788), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-13 01:37:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 987 transitions. [2021-11-13 01:37:04,887 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 987 transitions. Word has length 117 [2021-11-13 01:37:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:04,887 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 987 transitions. [2021-11-13 01:37:04,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:37:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 987 transitions. [2021-11-13 01:37:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:37:04,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:04,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:04,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:05,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:05,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1805408949, now seen corresponding path program 1 times [2021-11-13 01:37:05,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:05,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893092996] [2021-11-13 01:37:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:05,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:05,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:05,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:05,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:37:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:05,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:06,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:06,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:06,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893092996] [2021-11-13 01:37:06,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893092996] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:06,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:06,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:37:06,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895908348] [2021-11-13 01:37:06,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:06,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:06,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:37:06,466 INFO L87 Difference]: Start difference. First operand 600 states and 987 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:06,791 INFO L93 Difference]: Finished difference Result 1194 states and 1972 transitions. [2021-11-13 01:37:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2021-11-13 01:37:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:06,799 INFO L225 Difference]: With dead ends: 1194 [2021-11-13 01:37:06,799 INFO L226 Difference]: Without dead ends: 609 [2021-11-13 01:37:06,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:06,805 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 104 mSDsluCounter, 4675 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5637 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.62ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:06,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5637 Invalid, 107 Unknown, 0 Unchecked, 11.76ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 254.62ms Time] [2021-11-13 01:37:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-13 01:37:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 600. [2021-11-13 01:37:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 473 states have (on average 1.6659619450317125) internal successors, (788), 490 states have internal predecessors, (788), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-13 01:37:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 987 transitions. [2021-11-13 01:37:06,837 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 987 transitions. Word has length 119 [2021-11-13 01:37:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:06,838 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 987 transitions. [2021-11-13 01:37:06,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 987 transitions. [2021-11-13 01:37:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 01:37:06,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:06,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:07,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:07,059 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:07,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1570987814, now seen corresponding path program 1 times [2021-11-13 01:37:07,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:07,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126586214] [2021-11-13 01:37:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:07,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:07,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:07,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:07,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:37:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:07,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:07,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:37:08,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:08,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126586214] [2021-11-13 01:37:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126586214] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:08,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:08,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:37:08,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168758334] [2021-11-13 01:37:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:08,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:37:08,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:37:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:08,283 INFO L87 Difference]: Start difference. First operand 600 states and 987 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:37:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:08,565 INFO L93 Difference]: Finished difference Result 1214 states and 2010 transitions. [2021-11-13 01:37:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-13 01:37:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:08,572 INFO L225 Difference]: With dead ends: 1214 [2021-11-13 01:37:08,572 INFO L226 Difference]: Without dead ends: 629 [2021-11-13 01:37:08,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:08,578 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 112 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.27ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.43ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:08,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2682 Invalid, 147 Unknown, 0 Unchecked, 7.27ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 223.43ms Time] [2021-11-13 01:37:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-13 01:37:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 620. [2021-11-13 01:37:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 492 states have (on average 1.660569105691057) internal successors, (817), 509 states have internal predecessors, (817), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:37:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1015 transitions. [2021-11-13 01:37:08,608 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1015 transitions. Word has length 120 [2021-11-13 01:37:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:08,609 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1015 transitions. [2021-11-13 01:37:08,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:37:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1015 transitions. [2021-11-13 01:37:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 01:37:08,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:08,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:08,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:08,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:08,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 916608113, now seen corresponding path program 1 times [2021-11-13 01:37:08,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:08,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606538317] [2021-11-13 01:37:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:08,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:08,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:08,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:08,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:37:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:09,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:09,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:10,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:10,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606538317] [2021-11-13 01:37:10,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606538317] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:10,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:10,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:37:10,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946502291] [2021-11-13 01:37:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:10,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:10,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:37:10,078 INFO L87 Difference]: Start difference. First operand 620 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:10,335 INFO L93 Difference]: Finished difference Result 1243 states and 2041 transitions. [2021-11-13 01:37:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 121 [2021-11-13 01:37:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:10,343 INFO L225 Difference]: With dead ends: 1243 [2021-11-13 01:37:10,344 INFO L226 Difference]: Without dead ends: 638 [2021-11-13 01:37:10,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:37:10,350 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 154 mSDsluCounter, 4603 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5553 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.22ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.68ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:10,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5553 Invalid, 89 Unknown, 0 Unchecked, 12.22ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 187.68ms Time] [2021-11-13 01:37:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-13 01:37:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 620. [2021-11-13 01:37:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 492 states have (on average 1.660569105691057) internal successors, (817), 509 states have internal predecessors, (817), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:37:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1015 transitions. [2021-11-13 01:37:10,383 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1015 transitions. Word has length 121 [2021-11-13 01:37:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:10,383 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1015 transitions. [2021-11-13 01:37:10,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1015 transitions. [2021-11-13 01:37:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 01:37:10,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:10,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:10,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:10,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:10,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1014266940, now seen corresponding path program 1 times [2021-11-13 01:37:10,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:10,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046600115] [2021-11-13 01:37:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:10,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:10,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:10,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:10,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:37:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:37:11,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:11,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:11,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:11,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046600115] [2021-11-13 01:37:11,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046600115] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:11,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:11,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:37:11,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930060510] [2021-11-13 01:37:11,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:11,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:37:11,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:37:11,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:37:11,953 INFO L87 Difference]: Start difference. First operand 620 states and 1015 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:12,311 INFO L93 Difference]: Finished difference Result 1238 states and 2032 transitions. [2021-11-13 01:37:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:37:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 122 [2021-11-13 01:37:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:12,320 INFO L225 Difference]: With dead ends: 1238 [2021-11-13 01:37:12,320 INFO L226 Difference]: Without dead ends: 633 [2021-11-13 01:37:12,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:37:12,328 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 112 mSDsluCounter, 5533 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6473 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.62ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:12,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6473 Invalid, 160 Unknown, 0 Unchecked, 11.62ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 261.25ms Time] [2021-11-13 01:37:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-13 01:37:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 624. [2021-11-13 01:37:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 496 states have (on average 1.655241935483871) internal successors, (821), 513 states have internal predecessors, (821), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:37:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1019 transitions. [2021-11-13 01:37:12,360 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1019 transitions. Word has length 122 [2021-11-13 01:37:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:12,360 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1019 transitions. [2021-11-13 01:37:12,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1019 transitions. [2021-11-13 01:37:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 01:37:12,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:12,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:12,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:12,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:12,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:12,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1179636911, now seen corresponding path program 1 times [2021-11-13 01:37:12,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:12,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905058571] [2021-11-13 01:37:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:12,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:12,594 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:12,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:37:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:37:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:13,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:13,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:13,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905058571] [2021-11-13 01:37:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905058571] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:13,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:13,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:37:13,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814576833] [2021-11-13 01:37:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:13,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:37:13,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:13,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:37:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:37:13,774 INFO L87 Difference]: Start difference. First operand 624 states and 1019 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:14,208 INFO L93 Difference]: Finished difference Result 1248 states and 2044 transitions. [2021-11-13 01:37:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:37:14,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2021-11-13 01:37:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:14,218 INFO L225 Difference]: With dead ends: 1248 [2021-11-13 01:37:14,218 INFO L226 Difference]: Without dead ends: 639 [2021-11-13 01:37:14,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:37:14,224 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 108 mSDsluCounter, 5539 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6481 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.79ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.11ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:14,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6481 Invalid, 179 Unknown, 0 Unchecked, 10.79ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 339.11ms Time] [2021-11-13 01:37:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-13 01:37:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 630. [2021-11-13 01:37:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 502 states have (on average 1.6474103585657371) internal successors, (827), 519 states have internal predecessors, (827), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:37:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1025 transitions. [2021-11-13 01:37:14,259 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1025 transitions. Word has length 123 [2021-11-13 01:37:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:14,260 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1025 transitions. [2021-11-13 01:37:14,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1025 transitions. [2021-11-13 01:37:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 01:37:14,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:14,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:14,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:14,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:14,482 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash 566463529, now seen corresponding path program 1 times [2021-11-13 01:37:14,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:14,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167475994] [2021-11-13 01:37:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:14,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:14,485 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:14,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:37:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:37:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:37:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:15,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:15,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167475994] [2021-11-13 01:37:15,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167475994] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:15,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:15,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:37:15,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491130157] [2021-11-13 01:37:15,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:15,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:37:15,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:15,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:37:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:37:15,706 INFO L87 Difference]: Start difference. First operand 630 states and 1025 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:16,124 INFO L93 Difference]: Finished difference Result 1262 states and 2060 transitions. [2021-11-13 01:37:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:37:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 124 [2021-11-13 01:37:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:16,131 INFO L225 Difference]: With dead ends: 1262 [2021-11-13 01:37:16,132 INFO L226 Difference]: Without dead ends: 647 [2021-11-13 01:37:16,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:37:16,138 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 108 mSDsluCounter, 5539 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6481 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.39ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.29ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:16,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6481 Invalid, 184 Unknown, 0 Unchecked, 8.39ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 316.29ms Time] [2021-11-13 01:37:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-13 01:37:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 638. [2021-11-13 01:37:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 510 states have (on average 1.6372549019607843) internal successors, (835), 527 states have internal predecessors, (835), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-13 01:37:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1033 transitions. [2021-11-13 01:37:16,168 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1033 transitions. Word has length 124 [2021-11-13 01:37:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:16,169 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1033 transitions. [2021-11-13 01:37:16,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:37:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1033 transitions. [2021-11-13 01:37:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:37:16,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:16,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:16,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:16,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:16,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1438604566, now seen corresponding path program 1 times [2021-11-13 01:37:16,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:16,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983550364] [2021-11-13 01:37:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:16,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:16,404 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:16,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:37:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:16,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:17,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:17,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:17,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983550364] [2021-11-13 01:37:17,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983550364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:17,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:17,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:37:17,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497351952] [2021-11-13 01:37:17,488 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:17,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:37:17,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:37:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:37:17,489 INFO L87 Difference]: Start difference. First operand 638 states and 1033 transitions. Second operand has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:37:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:17,834 INFO L93 Difference]: Finished difference Result 1201 states and 1944 transitions. [2021-11-13 01:37:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:37:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 125 [2021-11-13 01:37:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:17,843 INFO L225 Difference]: With dead ends: 1201 [2021-11-13 01:37:17,845 INFO L226 Difference]: Without dead ends: 656 [2021-11-13 01:37:17,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:17,851 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 186 mSDsluCounter, 6616 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 7566 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.77ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.07ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:17,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 7566 Invalid, 151 Unknown, 0 Unchecked, 8.77ms Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 283.07ms Time] [2021-11-13 01:37:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-13 01:37:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 645. [2021-11-13 01:37:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 514 states have (on average 1.632295719844358) internal successors, (839), 533 states have internal predecessors, (839), 101 states have call successors, (101), 28 states have call predecessors, (101), 29 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2021-11-13 01:37:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1042 transitions. [2021-11-13 01:37:17,883 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1042 transitions. Word has length 125 [2021-11-13 01:37:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:17,884 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1042 transitions. [2021-11-13 01:37:17,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:37:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1042 transitions. [2021-11-13 01:37:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 01:37:17,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:17,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:17,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:18,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:18,113 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1493422036, now seen corresponding path program 1 times [2021-11-13 01:37:18,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:18,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195412014] [2021-11-13 01:37:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:18,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:18,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:18,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:18,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:37:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:18,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:19,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:19,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195412014] [2021-11-13 01:37:19,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195412014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:19,288 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:19,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:37:19,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152958990] [2021-11-13 01:37:19,289 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:19,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:37:19,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:37:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:37:19,290 INFO L87 Difference]: Start difference. First operand 645 states and 1042 transitions. Second operand has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:37:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:19,654 INFO L93 Difference]: Finished difference Result 1204 states and 1947 transitions. [2021-11-13 01:37:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:37:19,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 127 [2021-11-13 01:37:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:19,662 INFO L225 Difference]: With dead ends: 1204 [2021-11-13 01:37:19,662 INFO L226 Difference]: Without dead ends: 659 [2021-11-13 01:37:19,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:37:19,667 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 180 mSDsluCounter, 5685 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 6637 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 302.37ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:19,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 6637 Invalid, 146 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 302.37ms Time] [2021-11-13 01:37:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-13 01:37:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 652. [2021-11-13 01:37:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 518 states have (on average 1.6274131274131274) internal successors, (843), 539 states have internal predecessors, (843), 102 states have call successors, (102), 28 states have call predecessors, (102), 31 states have return successors, (106), 97 states have call predecessors, (106), 99 states have call successors, (106) [2021-11-13 01:37:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1051 transitions. [2021-11-13 01:37:19,714 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1051 transitions. Word has length 127 [2021-11-13 01:37:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:19,714 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1051 transitions. [2021-11-13 01:37:19,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:37:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1051 transitions. [2021-11-13 01:37:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 01:37:19,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:19,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:19,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:19,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:19,943 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1685221104, now seen corresponding path program 1 times [2021-11-13 01:37:19,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:19,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568050075] [2021-11-13 01:37:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:19,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:19,946 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:19,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:37:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:20,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:20,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:37:21,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:21,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568050075] [2021-11-13 01:37:21,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568050075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:21,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:21,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 01:37:21,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205671756] [2021-11-13 01:37:21,010 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:21,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:37:21,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:21,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:37:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:37:21,012 INFO L87 Difference]: Start difference. First operand 652 states and 1051 transitions. Second operand has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 01:37:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:21,291 INFO L93 Difference]: Finished difference Result 1205 states and 1948 transitions. [2021-11-13 01:37:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 127 [2021-11-13 01:37:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:21,298 INFO L225 Difference]: With dead ends: 1205 [2021-11-13 01:37:21,298 INFO L226 Difference]: Without dead ends: 660 [2021-11-13 01:37:21,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:37:21,303 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 145 mSDsluCounter, 5497 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 214.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6451 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:21,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 6451 Invalid, 101 Unknown, 0 Unchecked, 6.67ms Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 232.04ms Time] [2021-11-13 01:37:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-13 01:37:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 655. [2021-11-13 01:37:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 520 states have (on average 1.625) internal successors, (845), 542 states have internal predecessors, (845), 102 states have call successors, (102), 28 states have call predecessors, (102), 32 states have return successors, (107), 97 states have call predecessors, (107), 99 states have call successors, (107) [2021-11-13 01:37:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1054 transitions. [2021-11-13 01:37:21,331 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1054 transitions. Word has length 127 [2021-11-13 01:37:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:21,332 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1054 transitions. [2021-11-13 01:37:21,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 01:37:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1054 transitions. [2021-11-13 01:37:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 01:37:21,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:21,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:21,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:21,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:21,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash 326508722, now seen corresponding path program 1 times [2021-11-13 01:37:21,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:21,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989038866] [2021-11-13 01:37:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:21,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:21,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:21,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:37:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:22,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:37:22,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:37:22,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:22,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989038866] [2021-11-13 01:37:22,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989038866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:22,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:22,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:37:22,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236519837] [2021-11-13 01:37:22,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:22,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:37:22,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:22,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:37:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:37:22,650 INFO L87 Difference]: Start difference. First operand 655 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:37:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:22,753 INFO L93 Difference]: Finished difference Result 1275 states and 2056 transitions. [2021-11-13 01:37:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:22,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 127 [2021-11-13 01:37:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:22,759 INFO L225 Difference]: With dead ends: 1275 [2021-11-13 01:37:22,760 INFO L226 Difference]: Without dead ends: 605 [2021-11-13 01:37:22,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:22,764 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 30 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2837 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.23ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.27ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:22,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2837 Invalid, 34 Unknown, 0 Unchecked, 22.23ms Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 50.27ms Time] [2021-11-13 01:37:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-13 01:37:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-13 01:37:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 477 states have (on average 1.6079664570230607) internal successors, (767), 494 states have internal predecessors, (767), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:37:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 964 transitions. [2021-11-13 01:37:22,789 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 964 transitions. Word has length 127 [2021-11-13 01:37:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:22,789 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 964 transitions. [2021-11-13 01:37:22,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:37:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 964 transitions. [2021-11-13 01:37:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 01:37:22,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:22,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:22,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:23,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:23,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:23,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1682333171, now seen corresponding path program 1 times [2021-11-13 01:37:23,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:23,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605732312] [2021-11-13 01:37:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:23,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:23,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:23,019 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:23,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:37:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:37:23,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:37:24,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:24,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605732312] [2021-11-13 01:37:24,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605732312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:24,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:24,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:37:24,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428052879] [2021-11-13 01:37:24,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:24,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:37:24,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:37:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:24,028 INFO L87 Difference]: Start difference. First operand 605 states and 964 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:37:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:24,257 INFO L93 Difference]: Finished difference Result 1236 states and 1961 transitions. [2021-11-13 01:37:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:37:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 129 [2021-11-13 01:37:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:24,264 INFO L225 Difference]: With dead ends: 1236 [2021-11-13 01:37:24,264 INFO L226 Difference]: Without dead ends: 602 [2021-11-13 01:37:24,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:37:24,270 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 120 mSDsluCounter, 3512 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:24,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 4405 Invalid, 99 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 164.59ms Time] [2021-11-13 01:37:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-13 01:37:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-13 01:37:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 474 states have (on average 1.5864978902953586) internal successors, (752), 490 states have internal predecessors, (752), 100 states have call successors, (100), 29 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-13 01:37:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 949 transitions. [2021-11-13 01:37:24,299 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 949 transitions. Word has length 129 [2021-11-13 01:37:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:24,300 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 949 transitions. [2021-11-13 01:37:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:37:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 949 transitions. [2021-11-13 01:37:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 01:37:24,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:24,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:24,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:24,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:24,529 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:24,530 INFO L85 PathProgramCache]: Analyzing trace with hash -559226990, now seen corresponding path program 1 times [2021-11-13 01:37:24,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:24,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343102563] [2021-11-13 01:37:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:24,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:24,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:24,532 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:24,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:37:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:37:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:37:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:37:26,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:26,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343102563] [2021-11-13 01:37:26,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343102563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:26,473 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:26,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-13 01:37:26,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256067582] [2021-11-13 01:37:26,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:26,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:37:26,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:37:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:26,489 INFO L87 Difference]: Start difference. First operand 602 states and 949 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:37:28,510 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 [] [2021-11-13 01:37:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:31,956 INFO L93 Difference]: Finished difference Result 1807 states and 2942 transitions. [2021-11-13 01:37:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 130 [2021-11-13 01:37:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:31,969 INFO L225 Difference]: With dead ends: 1807 [2021-11-13 01:37:31,969 INFO L226 Difference]: Without dead ends: 1266 [2021-11-13 01:37:31,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:31,976 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 1801 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 336 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4717.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.14ms SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5335.42ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:31,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1847 Valid, 2876 Invalid, 751 Unknown, 0 Unchecked, 19.14ms Time], IncrementalHoareTripleChecker [336 Valid, 414 Invalid, 1 Unknown, 0 Unchecked, 5335.42ms Time] [2021-11-13 01:37:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-11-13 01:37:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1163. [2021-11-13 01:37:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 919 states have (on average 1.6126224156692057) internal successors, (1482), 947 states have internal predecessors, (1482), 197 states have call successors, (197), 48 states have call predecessors, (197), 46 states have return successors, (202), 182 states have call predecessors, (202), 193 states have call successors, (202) [2021-11-13 01:37:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1881 transitions. [2021-11-13 01:37:32,041 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1881 transitions. Word has length 130 [2021-11-13 01:37:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1881 transitions. [2021-11-13 01:37:32,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:37:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1881 transitions. [2021-11-13 01:37:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 01:37:32,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:32,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:32,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:32,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:32,264 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash 133105036, now seen corresponding path program 1 times [2021-11-13 01:37:32,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:32,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277078647] [2021-11-13 01:37:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:32,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:32,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:32,266 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:32,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:37:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:32,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 01:37:32,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:37:33,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:37:33,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:33,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277078647] [2021-11-13 01:37:33,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277078647] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:33,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:33,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-13 01:37:33,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249468474] [2021-11-13 01:37:33,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:33,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:33,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:37:33,696 INFO L87 Difference]: Start difference. First operand 1163 states and 1881 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:37:35,724 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 [] [2021-11-13 01:37:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:39,467 INFO L93 Difference]: Finished difference Result 3919 states and 6607 transitions. [2021-11-13 01:37:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:37:39,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 131 [2021-11-13 01:37:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:39,494 INFO L225 Difference]: With dead ends: 3919 [2021-11-13 01:37:39,495 INFO L226 Difference]: Without dead ends: 2817 [2021-11-13 01:37:39,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:37:39,507 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 2491 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 552 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4952.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2598 SdHoareTripleChecker+Valid, 4522 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.12ms SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5500.20ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:39,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2598 Valid, 4522 Invalid, 2212 Unknown, 0 Unchecked, 31.12ms Time], IncrementalHoareTripleChecker [552 Valid, 1659 Invalid, 1 Unknown, 0 Unchecked, 5500.20ms Time] [2021-11-13 01:37:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-11-13 01:37:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2193. [2021-11-13 01:37:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 1729 states have (on average 1.6367842683632157) internal successors, (2830), 1785 states have internal predecessors, (2830), 376 states have call successors, (376), 84 states have call predecessors, (376), 87 states have return successors, (444), 353 states have call predecessors, (444), 370 states have call successors, (444) [2021-11-13 01:37:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3650 transitions. [2021-11-13 01:37:39,688 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3650 transitions. Word has length 131 [2021-11-13 01:37:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 3650 transitions. [2021-11-13 01:37:39,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:37:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3650 transitions. [2021-11-13 01:37:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 01:37:39,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:39,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:39,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:39,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:39,895 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1132247174, now seen corresponding path program 1 times [2021-11-13 01:37:39,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:39,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442804771] [2021-11-13 01:37:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:39,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:39,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:39,897 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:39,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:37:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:37:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:37:40,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:37:41,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:41,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442804771] [2021-11-13 01:37:41,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442804771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:41,036 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:41,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:37:41,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080570506] [2021-11-13 01:37:41,037 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:41,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:41,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:41,038 INFO L87 Difference]: Start difference. First operand 2193 states and 3650 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 01:37:43,057 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 [] [2021-11-13 01:37:45,065 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 [] [2021-11-13 01:37:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:47,828 INFO L93 Difference]: Finished difference Result 7218 states and 12383 transitions. [2021-11-13 01:37:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:37:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 132 [2021-11-13 01:37:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:47,876 INFO L225 Difference]: With dead ends: 7218 [2021-11-13 01:37:47,876 INFO L226 Difference]: Without dead ends: 5086 [2021-11-13 01:37:47,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:37:47,900 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 1039 mSDsluCounter, 3461 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 64 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6152.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 4822 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.73ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6470.95ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:47,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 4822 Invalid, 1542 Unknown, 0 Unchecked, 20.73ms Time], IncrementalHoareTripleChecker [64 Valid, 1476 Invalid, 2 Unknown, 0 Unchecked, 6470.95ms Time] [2021-11-13 01:37:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-11-13 01:37:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 4812. [2021-11-13 01:37:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4812 states, 3675 states have (on average 1.606530612244898) internal successors, (5904), 3833 states have internal predecessors, (5904), 955 states have call successors, (955), 170 states have call predecessors, (955), 181 states have return successors, (1189), 888 states have call predecessors, (1189), 945 states have call successors, (1189) [2021-11-13 01:37:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4812 states to 4812 states and 8048 transitions. [2021-11-13 01:37:48,298 INFO L78 Accepts]: Start accepts. Automaton has 4812 states and 8048 transitions. Word has length 132 [2021-11-13 01:37:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 4812 states and 8048 transitions. [2021-11-13 01:37:48,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 01:37:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4812 states and 8048 transitions. [2021-11-13 01:37:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 01:37:48,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:48,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:48,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:48,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:48,536 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 532665384, now seen corresponding path program 1 times [2021-11-13 01:37:48,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:48,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923030812] [2021-11-13 01:37:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:48,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:48,542 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:48,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:37:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:49,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:37:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:37:49,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:37:49,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:49,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923030812] [2021-11-13 01:37:49,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923030812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:49,678 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:49,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 7 [2021-11-13 01:37:49,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940366868] [2021-11-13 01:37:49,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:49,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:49,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:49,680 INFO L87 Difference]: Start difference. First operand 4812 states and 8048 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:37:51,700 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 [] [2021-11-13 01:37:53,707 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 [] [2021-11-13 01:37:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:56,377 INFO L93 Difference]: Finished difference Result 15446 states and 27397 transitions. [2021-11-13 01:37:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:37:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2021-11-13 01:37:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:56,483 INFO L225 Difference]: With dead ends: 15446 [2021-11-13 01:37:56,483 INFO L226 Difference]: Without dead ends: 10695 [2021-11-13 01:37:56,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:37:56,523 INFO L933 BasicCegarLoop]: 1214 mSDtfsCounter, 1209 mSDsluCounter, 5092 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 150 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5748.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 6306 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.96ms SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6008.44ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:56,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 6306 Invalid, 1044 Unknown, 0 Unchecked, 20.96ms Time], IncrementalHoareTripleChecker [150 Valid, 892 Invalid, 2 Unknown, 0 Unchecked, 6008.44ms Time] [2021-11-13 01:37:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-11-13 01:37:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 7855. [2021-11-13 01:37:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7855 states, 5946 states have (on average 1.591490077362933) internal successors, (9463), 6204 states have internal predecessors, (9463), 1614 states have call successors, (1614), 260 states have call predecessors, (1614), 294 states have return successors, (2260), 1546 states have call predecessors, (2260), 1600 states have call successors, (2260) [2021-11-13 01:37:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7855 states to 7855 states and 13337 transitions. [2021-11-13 01:37:57,394 INFO L78 Accepts]: Start accepts. Automaton has 7855 states and 13337 transitions. Word has length 138 [2021-11-13 01:37:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:57,395 INFO L470 AbstractCegarLoop]: Abstraction has 7855 states and 13337 transitions. [2021-11-13 01:37:57,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:37:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7855 states and 13337 transitions. [2021-11-13 01:37:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 01:37:57,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:57,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:57,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:57,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:57,630 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash 981219907, now seen corresponding path program 1 times [2021-11-13 01:37:57,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:57,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357004556] [2021-11-13 01:37:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:57,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:57,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:37:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:58,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:37:58,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:37:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:37:58,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:58,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357004556] [2021-11-13 01:37:58,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357004556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:58,719 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:37:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705208023] [2021-11-13 01:37:58,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:37:58,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:37:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:37:58,721 INFO L87 Difference]: Start difference. First operand 7855 states and 13337 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:00,755 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 [] [2021-11-13 01:38:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:02,445 INFO L93 Difference]: Finished difference Result 21313 states and 37720 transitions. [2021-11-13 01:38:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:38:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 139 [2021-11-13 01:38:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:02,537 INFO L225 Difference]: With dead ends: 21313 [2021-11-13 01:38:02,537 INFO L226 Difference]: Without dead ends: 13519 [2021-11-13 01:38:02,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:02,598 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 1668 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2875.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.93ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3034.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:02,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 3088 Invalid, 439 Unknown, 0 Unchecked, 7.93ms Time], IncrementalHoareTripleChecker [15 Valid, 423 Invalid, 1 Unknown, 0 Unchecked, 3034.04ms Time] [2021-11-13 01:38:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13519 states. [2021-11-13 01:38:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13519 to 13515. [2021-11-13 01:38:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13515 states, 10172 states have (on average 1.5818914667715296) internal successors, (16091), 10636 states have internal predecessors, (16091), 2840 states have call successors, (2840), 440 states have call predecessors, (2840), 502 states have return successors, (4353), 2746 states have call predecessors, (4353), 2818 states have call successors, (4353) [2021-11-13 01:38:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13515 states to 13515 states and 23284 transitions. [2021-11-13 01:38:03,683 INFO L78 Accepts]: Start accepts. Automaton has 13515 states and 23284 transitions. Word has length 139 [2021-11-13 01:38:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:03,684 INFO L470 AbstractCegarLoop]: Abstraction has 13515 states and 23284 transitions. [2021-11-13 01:38:03,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13515 states and 23284 transitions. [2021-11-13 01:38:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 01:38:03,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:03,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:03,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:03,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:03,903 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:03,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash 365078501, now seen corresponding path program 1 times [2021-11-13 01:38:03,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:03,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673372053] [2021-11-13 01:38:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:03,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:03,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:03,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:38:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:38:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:38:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:38:05,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:05,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673372053] [2021-11-13 01:38:05,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673372053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:05,050 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:05,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:38:05,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579542117] [2021-11-13 01:38:05,051 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:05,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:38:05,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:38:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:05,052 INFO L87 Difference]: Start difference. First operand 13515 states and 23284 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:07,082 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 [] [2021-11-13 01:38:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:09,696 INFO L93 Difference]: Finished difference Result 38313 states and 69614 transitions. [2021-11-13 01:38:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:38:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 140 [2021-11-13 01:38:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:09,888 INFO L225 Difference]: With dead ends: 38313 [2021-11-13 01:38:09,889 INFO L226 Difference]: Without dead ends: 24859 [2021-11-13 01:38:10,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:10,024 INFO L933 BasicCegarLoop]: 1751 mSDtfsCounter, 1676 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2898.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 3104 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3080.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:10,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 3104 Invalid, 441 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [15 Valid, 425 Invalid, 1 Unknown, 0 Unchecked, 3080.34ms Time] [2021-11-13 01:38:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24859 states. [2021-11-13 01:38:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24859 to 24855. [2021-11-13 01:38:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24855 states, 18640 states have (on average 1.574087982832618) internal successors, (29341), 19516 states have internal predecessors, (29341), 5296 states have call successors, (5296), 800 states have call predecessors, (5296), 918 states have return successors, (9122), 5150 states have call predecessors, (9122), 5258 states have call successors, (9122) [2021-11-13 01:38:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24855 states to 24855 states and 43759 transitions. [2021-11-13 01:38:12,319 INFO L78 Accepts]: Start accepts. Automaton has 24855 states and 43759 transitions. Word has length 140 [2021-11-13 01:38:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:12,320 INFO L470 AbstractCegarLoop]: Abstraction has 24855 states and 43759 transitions. [2021-11-13 01:38:12,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24855 states and 43759 transitions. [2021-11-13 01:38:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 01:38:12,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:12,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:12,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:12,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:12,548 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1536830750, now seen corresponding path program 1 times [2021-11-13 01:38:12,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:12,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505117186] [2021-11-13 01:38:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:12,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:12,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:12,552 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:12,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:38:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:38:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:38:13,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:38:13,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:13,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505117186] [2021-11-13 01:38:13,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505117186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:13,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:13,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:38:13,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427266443] [2021-11-13 01:38:13,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:13,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:38:13,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:38:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:13,982 INFO L87 Difference]: Start difference. First operand 24855 states and 43759 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:16,004 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 [] [2021-11-13 01:38:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:20,314 INFO L93 Difference]: Finished difference Result 72353 states and 136714 transitions. [2021-11-13 01:38:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:38:20,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 141 [2021-11-13 01:38:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:20,714 INFO L225 Difference]: With dead ends: 72353 [2021-11-13 01:38:20,714 INFO L226 Difference]: Without dead ends: 47559 [2021-11-13 01:38:21,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:21,101 INFO L933 BasicCegarLoop]: 1760 mSDtfsCounter, 1684 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3025.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.11ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3179.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:21,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 3120 Invalid, 443 Unknown, 0 Unchecked, 8.11ms Time], IncrementalHoareTripleChecker [15 Valid, 427 Invalid, 1 Unknown, 0 Unchecked, 3179.40ms Time] [2021-11-13 01:38:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47559 states. [2021-11-13 01:38:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47559 to 47555. [2021-11-13 01:38:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47555 states, 35592 states have (on average 1.5671780175320296) internal successors, (55779), 37292 states have internal predecessors, (55779), 10212 states have call successors, (10212), 1520 states have call predecessors, (10212), 1750 states have return successors, (20437), 9962 states have call predecessors, (20437), 10142 states have call successors, (20437) [2021-11-13 01:38:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47555 states to 47555 states and 86428 transitions. [2021-11-13 01:38:25,169 INFO L78 Accepts]: Start accepts. Automaton has 47555 states and 86428 transitions. Word has length 141 [2021-11-13 01:38:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:25,170 INFO L470 AbstractCegarLoop]: Abstraction has 47555 states and 86428 transitions. [2021-11-13 01:38:25,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 47555 states and 86428 transitions. [2021-11-13 01:38:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:38:25,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:25,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:25,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:25,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:25,399 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1996255840, now seen corresponding path program 1 times [2021-11-13 01:38:25,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:25,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309571611] [2021-11-13 01:38:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:25,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:25,402 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:25,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:38:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:26,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:38:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:38:26,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:38:26,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:26,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309571611] [2021-11-13 01:38:26,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309571611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:26,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:26,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-13 01:38:26,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888012659] [2021-11-13 01:38:26,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:26,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:38:26,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:38:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:26,791 INFO L87 Difference]: Start difference. First operand 47555 states and 86428 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:28,811 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 [] [2021-11-13 01:38:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:37,390 INFO L93 Difference]: Finished difference Result 140473 states and 281292 transitions. [2021-11-13 01:38:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:38:37,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 142 [2021-11-13 01:38:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:38,241 INFO L225 Difference]: With dead ends: 140473 [2021-11-13 01:38:38,241 INFO L226 Difference]: Without dead ends: 92979 [2021-11-13 01:38:39,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:38:39,216 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 1692 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2858.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.06ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3012.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:39,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 3136 Invalid, 445 Unknown, 0 Unchecked, 8.06ms Time], IncrementalHoareTripleChecker [15 Valid, 429 Invalid, 1 Unknown, 0 Unchecked, 3012.88ms Time] [2021-11-13 01:38:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92979 states. [2021-11-13 01:38:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92979 to 92975. [2021-11-13 01:38:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92975 states, 69512 states have (on average 1.5606082403038324) internal successors, (108481), 72860 states have internal predecessors, (108481), 20048 states have call successors, (20048), 2960 states have call predecessors, (20048), 3414 states have return successors, (48640), 19590 states have call predecessors, (48640), 19914 states have call successors, (48640) [2021-11-13 01:38:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92975 states to 92975 states and 177169 transitions. [2021-11-13 01:38:47,583 INFO L78 Accepts]: Start accepts. Automaton has 92975 states and 177169 transitions. Word has length 142 [2021-11-13 01:38:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:47,583 INFO L470 AbstractCegarLoop]: Abstraction has 92975 states and 177169 transitions. [2021-11-13 01:38:47,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 01:38:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 92975 states and 177169 transitions. [2021-11-13 01:38:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:38:47,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:47,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:47,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:47,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:47,788 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1817631198, now seen corresponding path program 1 times [2021-11-13 01:38:47,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:47,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828347072] [2021-11-13 01:38:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:47,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:47,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:47,791 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:47,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41ca7aa-f2fe-4525-bc33-3f566a8c35fc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 01:38:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:38:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:38:48,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:38:49,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:49,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828347072] [2021-11-13 01:38:49,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828347072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:49,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:49,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 11 [2021-11-13 01:38:49,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090678772] [2021-11-13 01:38:49,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:49,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:38:49,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:38:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:38:49,319 INFO L87 Difference]: Start difference. First operand 92975 states and 177169 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 5 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-13 01:38:51,350 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 [] [2021-11-13 01:38:53,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:55,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:09,990 INFO L93 Difference]: Finished difference Result 224153 states and 440193 transitions. [2021-11-13 01:39:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 01:39:09,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 5 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 142 [2021-11-13 01:39:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted.