./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:22:28,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:22:28,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:22:28,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:22:28,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:22:28,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:22:28,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:22:28,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:22:28,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:22:28,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:22:28,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:22:28,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:22:28,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:22:28,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:22:28,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:22:28,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:22:28,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:22:28,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:22:28,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:22:28,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:22:28,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:22:28,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:22:28,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:22:28,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:22:28,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:22:28,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:22:28,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:22:28,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:22:28,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:22:28,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:22:28,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:22:28,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:22:28,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:22:28,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:22:28,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:22:28,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:22:28,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:22:28,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:22:28,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:22:28,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:22:28,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:22:28,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:22:28,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:22:28,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:22:28,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:22:28,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:22:28,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:22:28,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:22:28,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:22:28,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:22:28,540 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:22:28,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:22:28,550 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:22:28,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:22:28,551 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:22:28,551 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:22:28,551 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:22:28,552 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:22:28,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:22:28,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:22:28,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:22:28,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:22:28,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:22:28,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:22:28,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:22:28,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:22:28,555 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:22:28,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:22:28,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:22:28,556 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:22:28,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:22:28,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:22:28,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:22:28,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:22:28,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:22:28,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:22:28,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:22:28,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:22:28,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:22:28,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:22:28,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:22:28,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:22:28,581 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_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-19 13:22:29,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:22:29,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:22:29,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:22:29,082 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:22:29,083 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:22:29,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-19 13:22:29,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/1a1f4f5fd/cb177c30004f44bfb56f81c9aa491124/FLAG0e536e099 [2021-11-19 13:22:29,966 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:22:29,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-19 13:22:30,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/1a1f4f5fd/cb177c30004f44bfb56f81c9aa491124/FLAG0e536e099 [2021-11-19 13:22:30,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/1a1f4f5fd/cb177c30004f44bfb56f81c9aa491124 [2021-11-19 13:22:30,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:22:30,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:22:30,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:30,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:22:30,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:22:30,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:22:30" (1/1) ... [2021-11-19 13:22:30,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbe9417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:30, skipping insertion in model container [2021-11-19 13:22:30,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:22:30" (1/1) ... [2021-11-19 13:22:30,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:22:30,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:22:30,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-19 13:22:30,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:30,913 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:22:30,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@371e38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:30, skipping insertion in model container [2021-11-19 13:22:30,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:30,914 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:22:30,917 INFO L158 Benchmark]: Toolchain (without parser) took 817.72ms. Allocated memory is still 117.4MB. Free memory was 94.4MB in the beginning and 66.3MB in the end (delta: 28.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-19 13:22:30,919 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 86.0MB. Free memory was 57.7MB in the beginning and 57.7MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:22:30,921 INFO L158 Benchmark]: CACSL2BoogieTranslator took 813.19ms. Allocated memory is still 117.4MB. Free memory was 94.0MB in the beginning and 66.3MB in the end (delta: 27.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-19 13:22:30,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 86.0MB. Free memory was 57.7MB in the beginning and 57.7MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 813.19ms. Allocated memory is still 117.4MB. Free memory was 94.0MB in the beginning and 66.3MB in the end (delta: 27.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2888]: 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_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:22:33,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:22:33,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:22:33,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:22:33,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:22:33,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:22:33,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:22:33,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:22:33,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:22:33,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:22:33,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:22:33,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:22:33,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:22:33,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:22:33,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:22:33,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:22:33,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:22:33,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:22:33,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:22:33,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:22:33,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:22:33,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:22:33,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:22:33,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:22:33,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:22:33,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:22:33,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:22:33,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:22:33,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:22:33,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:22:33,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:22:33,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:22:33,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:22:33,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:22:33,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:22:33,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:22:33,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:22:33,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:22:33,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:22:33,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:22:33,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:22:33,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:22:33,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:22:33,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:22:33,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:22:33,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:22:33,467 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:22:33,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:22:33,468 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:22:33,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:22:33,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:22:33,468 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:22:33,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:22:33,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:22:33,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:22:33,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:22:33,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:22:33,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:22:33,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:22:33,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:22:33,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:22:33,472 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:22:33,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:22:33,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:22:33,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:22:33,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:22:33,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:22:33,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:22:33,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:22:33,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:22:33,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:22:33,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:22:33,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:22:33,475 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:22:33,475 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:22:33,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:22:33,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:22:33,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:22:33,476 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_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-19 13:22:33,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:22:33,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:22:33,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:22:33,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:22:33,927 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:22:33,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-19 13:22:34,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/ed44a30c6/6de6e06ca3c548309b821cf21a45b134/FLAG08c0f1418 [2021-11-19 13:22:34,754 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:22:34,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-19 13:22:34,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/ed44a30c6/6de6e06ca3c548309b821cf21a45b134/FLAG08c0f1418 [2021-11-19 13:22:34,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/data/ed44a30c6/6de6e06ca3c548309b821cf21a45b134 [2021-11-19 13:22:34,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:22:34,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:22:34,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:34,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:22:34,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:22:34,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:22:34" (1/1) ... [2021-11-19 13:22:34,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a58c0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:34, skipping insertion in model container [2021-11-19 13:22:34,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:22:34" (1/1) ... [2021-11-19 13:22:34,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:22:35,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:22:35,565 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-19 13:22:35,757 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:35,776 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:22:35,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:22:35,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-19 13:22:36,027 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:36,048 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:22:36,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-19 13:22:36,155 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:36,205 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:22:36,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36 WrapperNode [2021-11-19 13:22:36,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:36,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:22:36,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:22:36,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:22:36,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,355 INFO L137 Inliner]: procedures = 99, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1116 [2021-11-19 13:22:36,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:22:36,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:22:36,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:22:36,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:22:36,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:22:36,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:22:36,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:22:36,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:22:36,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (1/1) ... [2021-11-19 13:22:36,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:22:36,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:22:36,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:22:36,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:22:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:22:36,629 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:22:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:22:36,629 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:22:36,630 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:22:36,630 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:22:36,630 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:22:36,630 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:22:36,630 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:22:36,630 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:22:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:22:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:22:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:22:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:22:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:22:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:22:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:22:36,632 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:22:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:22:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:22:36,632 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:22:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:22:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:22:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:22:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:22:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:22:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:22:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:22:36,634 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:22:36,634 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:22:36,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:22:36,634 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:22:36,634 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:22:36,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:22:36,635 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:22:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:22:36,635 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:22:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:22:36,635 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:22:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:22:36,635 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:22:36,636 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:22:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:22:36,636 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:22:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:22:36,637 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:22:36,637 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:22:36,637 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:22:36,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:22:36,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:22:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:22:36,641 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:22:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 13:22:36,641 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 13:22:36,850 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:22:36,869 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:22:38,388 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:22:38,418 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:22:38,418 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:22:38,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:22:38 BoogieIcfgContainer [2021-11-19 13:22:38,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:22:38,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:22:38,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:22:38,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:22:38,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:22:34" (1/3) ... [2021-11-19 13:22:38,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d679b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:22:38, skipping insertion in model container [2021-11-19 13:22:38,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:36" (2/3) ... [2021-11-19 13:22:38,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d679b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:22:38, skipping insertion in model container [2021-11-19 13:22:38,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:22:38" (3/3) ... [2021-11-19 13:22:38,432 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2021-11-19 13:22:38,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:22:38,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:22:38,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:22:38,511 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:22:38,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:22:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 578 states, 452 states have (on average 1.6880530973451326) internal successors, (763), 475 states have internal predecessors, (763), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 13:22:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 13:22:38,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:38,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:38,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1274281264, now seen corresponding path program 1 times [2021-11-19 13:22:38,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:38,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788750127] [2021-11-19 13:22:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:38,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:38,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:38,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:22:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:22:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:39,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:39,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:39,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788750127] [2021-11-19 13:22:39,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788750127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:39,639 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:39,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:22:39,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883233194] [2021-11-19 13:22:39,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:39,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:22:39,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:22:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:22:39,699 INFO L87 Difference]: Start difference. First operand has 578 states, 452 states have (on average 1.6880530973451326) internal successors, (763), 475 states have internal predecessors, (763), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 13:22:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:39,843 INFO L93 Difference]: Finished difference Result 599 states and 991 transitions. [2021-11-19 13:22:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:22:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-19 13:22:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:39,886 INFO L225 Difference]: With dead ends: 599 [2021-11-19 13:22:39,886 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:22:39,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:22:39,899 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:39,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:22:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:22:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 13:22:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 446 states have (on average 1.6860986547085202) internal successors, (752), 467 states have internal predecessors, (752), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:22:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 945 transitions. [2021-11-19 13:22:40,082 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 945 transitions. Word has length 60 [2021-11-19 13:22:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 945 transitions. [2021-11-19 13:22:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 13:22:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 945 transitions. [2021-11-19 13:22:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:22:40,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:40,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:40,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:40,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:40,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1482839356, now seen corresponding path program 1 times [2021-11-19 13:22:40,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:40,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985061713] [2021-11-19 13:22:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:40,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:40,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:22:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:22:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:40,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:41,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:41,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985061713] [2021-11-19 13:22:41,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985061713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:41,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:41,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:22:41,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342202414] [2021-11-19 13:22:41,225 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:22:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:22:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:22:41,230 INFO L87 Difference]: Start difference. First operand 570 states and 945 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:22:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:41,442 INFO L93 Difference]: Finished difference Result 1124 states and 1868 transitions. [2021-11-19 13:22:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:22:41,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2021-11-19 13:22:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:41,451 INFO L225 Difference]: With dead ends: 1124 [2021-11-19 13:22:41,452 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:22:41,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:22:41,466 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 15 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3721 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:41,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3721 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:22:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:22:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 13:22:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 446 states have (on average 1.6726457399103138) internal successors, (746), 467 states have internal predecessors, (746), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:22:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 939 transitions. [2021-11-19 13:22:41,541 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 939 transitions. Word has length 62 [2021-11-19 13:22:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:41,542 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 939 transitions. [2021-11-19 13:22:41,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:22:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 939 transitions. [2021-11-19 13:22:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 13:22:41,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:41,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:41,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:41,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:41,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1686384446, now seen corresponding path program 1 times [2021-11-19 13:22:41,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:41,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188978753] [2021-11-19 13:22:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:41,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:41,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:41,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:22:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:22:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:42,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:42,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:42,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188978753] [2021-11-19 13:22:42,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188978753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:42,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:42,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:22:42,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361732764] [2021-11-19 13:22:42,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:42,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:22:42,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:22:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:22:42,839 INFO L87 Difference]: Start difference. First operand 570 states and 939 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:22:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:43,048 INFO L93 Difference]: Finished difference Result 1082 states and 1785 transitions. [2021-11-19 13:22:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:22:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-19 13:22:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:43,057 INFO L225 Difference]: With dead ends: 1082 [2021-11-19 13:22:43,057 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 13:22:43,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:22:43,063 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 214 mSDsluCounter, 4609 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5535 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:43,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5535 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:22:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 13:22:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-19 13:22:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 440 states have (on average 1.665909090909091) internal successors, (733), 461 states have internal predecessors, (733), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:22:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 926 transitions. [2021-11-19 13:22:43,105 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 926 transitions. Word has length 67 [2021-11-19 13:22:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:43,106 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 926 transitions. [2021-11-19 13:22:43,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:22:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 926 transitions. [2021-11-19 13:22:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:22:43,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:43,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:43,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:43,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:43,326 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1638465115, now seen corresponding path program 1 times [2021-11-19 13:22:43,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:43,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7325349] [2021-11-19 13:22:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:43,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:43,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:43,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:22:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:22:43,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:44,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:44,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7325349] [2021-11-19 13:22:44,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7325349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:44,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:44,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:22:44,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969800141] [2021-11-19 13:22:44,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:44,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:22:44,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:22:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:22:44,196 INFO L87 Difference]: Start difference. First operand 564 states and 926 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:22:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:44,392 INFO L93 Difference]: Finished difference Result 1085 states and 1786 transitions. [2021-11-19 13:22:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:22:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-19 13:22:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:44,400 INFO L225 Difference]: With dead ends: 1085 [2021-11-19 13:22:44,400 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 13:22:44,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:22:44,406 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 215 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:44,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1765 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:22:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 13:22:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-19 13:22:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 440 states have (on average 1.6113636363636363) internal successors, (709), 461 states have internal predecessors, (709), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:22:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 902 transitions. [2021-11-19 13:22:44,444 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 902 transitions. Word has length 68 [2021-11-19 13:22:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:44,445 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 902 transitions. [2021-11-19 13:22:44,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:22:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 902 transitions. [2021-11-19 13:22:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 13:22:44,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:44,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:44,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:44,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:44,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1867098464, now seen corresponding path program 1 times [2021-11-19 13:22:44,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:44,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977666045] [2021-11-19 13:22:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:44,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:44,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:22:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:22:45,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:45,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:45,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:45,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977666045] [2021-11-19 13:22:45,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977666045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:45,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:45,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:22:45,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576789393] [2021-11-19 13:22:45,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:45,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:22:45,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:22:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:22:45,691 INFO L87 Difference]: Start difference. First operand 564 states and 902 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 13:22:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:45,859 INFO L93 Difference]: Finished difference Result 1076 states and 1748 transitions. [2021-11-19 13:22:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:22:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-19 13:22:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:45,868 INFO L225 Difference]: With dead ends: 1076 [2021-11-19 13:22:45,868 INFO L226 Difference]: Without dead ends: 543 [2021-11-19 13:22:45,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:22:45,874 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 89 mSDsluCounter, 5239 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6129 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:45,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6129 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:22:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-19 13:22:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-19 13:22:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 419 states have (on average 1.6324582338902147) internal successors, (684), 440 states have internal predecessors, (684), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:22:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 877 transitions. [2021-11-19 13:22:45,910 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 877 transitions. Word has length 70 [2021-11-19 13:22:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:45,911 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 877 transitions. [2021-11-19 13:22:45,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 13:22:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 877 transitions. [2021-11-19 13:22:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:22:45,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:45,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:45,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:46,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:46,126 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -79778101, now seen corresponding path program 1 times [2021-11-19 13:22:46,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:46,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115269558] [2021-11-19 13:22:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:46,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:46,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:46,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:46,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:22:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:22:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:46,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:47,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:47,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115269558] [2021-11-19 13:22:47,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115269558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:47,239 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:47,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:22:47,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158860508] [2021-11-19 13:22:47,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:47,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:22:47,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:22:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:22:47,242 INFO L87 Difference]: Start difference. First operand 543 states and 877 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:22:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:47,450 INFO L93 Difference]: Finished difference Result 1049 states and 1712 transitions. [2021-11-19 13:22:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:22:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-19 13:22:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:47,457 INFO L225 Difference]: With dead ends: 1049 [2021-11-19 13:22:47,458 INFO L226 Difference]: Without dead ends: 543 [2021-11-19 13:22:47,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:22:47,463 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 46 mSDsluCounter, 5157 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6019 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:47,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 6019 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:22:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-19 13:22:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-19 13:22:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 419 states have (on average 1.630071599045346) internal successors, (683), 440 states have internal predecessors, (683), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:22:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 876 transitions. [2021-11-19 13:22:47,498 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 876 transitions. Word has length 73 [2021-11-19 13:22:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:47,499 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 876 transitions. [2021-11-19 13:22:47,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:22:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 876 transitions. [2021-11-19 13:22:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:22:47,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:47,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:47,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:47,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:47,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:47,722 INFO L85 PathProgramCache]: Analyzing trace with hash -688964934, now seen corresponding path program 1 times [2021-11-19 13:22:47,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:47,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858669014] [2021-11-19 13:22:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:47,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:47,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:47,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:22:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:48,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:22:48,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:48,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:49,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:49,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858669014] [2021-11-19 13:22:49,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858669014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:49,370 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:49,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 13:22:49,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985897461] [2021-11-19 13:22:49,370 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:49,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:22:49,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:22:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:22:49,372 INFO L87 Difference]: Start difference. First operand 543 states and 876 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 13:23:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:00,127 INFO L93 Difference]: Finished difference Result 2735 states and 4547 transitions. [2021-11-19 13:23:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:23:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 74 [2021-11-19 13:23:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:00,179 INFO L225 Difference]: With dead ends: 2735 [2021-11-19 13:23:00,183 INFO L226 Difference]: Without dead ends: 2237 [2021-11-19 13:23:00,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:23:00,191 INFO L933 BasicCegarLoop]: 1571 mSDtfsCounter, 5387 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 6261 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5571 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 7648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 6261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:00,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5571 Valid, 3717 Invalid, 7648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1387 Valid, 6261 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 13:23:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-19 13:23:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2049. [2021-11-19 13:23:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1572 states have (on average 1.6622137404580153) internal successors, (2613), 1637 states have internal predecessors, (2613), 395 states have call successors, (395), 78 states have call predecessors, (395), 81 states have return successors, (403), 360 states have call predecessors, (403), 390 states have call successors, (403) [2021-11-19 13:23:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 3411 transitions. [2021-11-19 13:23:00,402 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 3411 transitions. Word has length 74 [2021-11-19 13:23:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:00,403 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 3411 transitions. [2021-11-19 13:23:00,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 13:23:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 3411 transitions. [2021-11-19 13:23:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:23:00,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:00,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:00,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:00,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:00,632 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2061681991, now seen corresponding path program 1 times [2021-11-19 13:23:00,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:00,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752100138] [2021-11-19 13:23:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:00,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:00,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:00,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:00,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:23:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:01,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:02,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:02,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752100138] [2021-11-19 13:23:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752100138] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:02,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:02,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:23:02,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272433467] [2021-11-19 13:23:02,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:02,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:02,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:02,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:02,265 INFO L87 Difference]: Start difference. First operand 2049 states and 3411 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:03,491 INFO L93 Difference]: Finished difference Result 4069 states and 6894 transitions. [2021-11-19 13:23:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-19 13:23:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:03,525 INFO L225 Difference]: With dead ends: 4069 [2021-11-19 13:23:03,526 INFO L226 Difference]: Without dead ends: 2065 [2021-11-19 13:23:03,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:03,557 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 806 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:03,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 2181 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:23:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-11-19 13:23:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 2065. [2021-11-19 13:23:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1584 states have (on average 1.6571969696969697) internal successors, (2625), 1649 states have internal predecessors, (2625), 395 states have call successors, (395), 82 states have call predecessors, (395), 85 states have return successors, (407), 360 states have call predecessors, (407), 390 states have call successors, (407) [2021-11-19 13:23:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3427 transitions. [2021-11-19 13:23:03,791 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3427 transitions. Word has length 127 [2021-11-19 13:23:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:03,792 INFO L470 AbstractCegarLoop]: Abstraction has 2065 states and 3427 transitions. [2021-11-19 13:23:03,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3427 transitions. [2021-11-19 13:23:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:23:03,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:03,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:03,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:04,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:04,029 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 828809680, now seen corresponding path program 1 times [2021-11-19 13:23:04,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:04,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745044049] [2021-11-19 13:23:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:04,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:04,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:04,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:23:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:23:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:23:04,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:23:05,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:05,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745044049] [2021-11-19 13:23:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745044049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:05,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:05,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:23:05,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191633137] [2021-11-19 13:23:05,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:05,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:23:05,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:23:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:23:05,685 INFO L87 Difference]: Start difference. First operand 2065 states and 3427 transitions. Second operand has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 13:23:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:16,373 INFO L93 Difference]: Finished difference Result 5493 states and 9106 transitions. [2021-11-19 13:23:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:23:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 128 [2021-11-19 13:23:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:16,416 INFO L225 Difference]: With dead ends: 5493 [2021-11-19 13:23:16,416 INFO L226 Difference]: Without dead ends: 3473 [2021-11-19 13:23:16,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:23:16,443 INFO L933 BasicCegarLoop]: 1788 mSDtfsCounter, 3215 mSDsluCounter, 3904 mSDsCounter, 0 mSdLazyCounter, 8369 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3305 SdHoareTripleChecker+Valid, 5692 SdHoareTripleChecker+Invalid, 9502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 8369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:16,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3305 Valid, 5692 Invalid, 9502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1133 Valid, 8369 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-19 13:23:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3473 states. [2021-11-19 13:23:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3473 to 3001. [2021-11-19 13:23:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2242 states have (on average 1.6119536128456735) internal successors, (3614), 2333 states have internal predecessors, (3614), 621 states have call successors, (621), 121 states have call predecessors, (621), 137 states have return successors, (663), 579 states have call predecessors, (663), 616 states have call successors, (663) [2021-11-19 13:23:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 4898 transitions. [2021-11-19 13:23:16,735 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 4898 transitions. Word has length 128 [2021-11-19 13:23:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:16,737 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 4898 transitions. [2021-11-19 13:23:16,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 13:23:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 4898 transitions. [2021-11-19 13:23:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:23:16,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:16,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:16,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-19 13:23:16,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:16,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2041046293, now seen corresponding path program 1 times [2021-11-19 13:23:16,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:16,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489329027] [2021-11-19 13:23:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:16,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:16,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:16,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:23:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:17,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:17,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:18,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:18,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489329027] [2021-11-19 13:23:18,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489329027] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:18,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:18,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:23:18,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357836819] [2021-11-19 13:23:18,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:18,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:18,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:18,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:18,314 INFO L87 Difference]: Start difference. First operand 3001 states and 4898 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:19,149 INFO L93 Difference]: Finished difference Result 6007 states and 9976 transitions. [2021-11-19 13:23:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-19 13:23:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:19,177 INFO L225 Difference]: With dead ends: 6007 [2021-11-19 13:23:19,177 INFO L226 Difference]: Without dead ends: 3051 [2021-11-19 13:23:19,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:19,207 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 806 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:19,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 2182 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:23:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-11-19 13:23:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3051. [2021-11-19 13:23:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 2282 states have (on average 1.6012269938650308) internal successors, (3654), 2373 states have internal predecessors, (3654), 621 states have call successors, (621), 131 states have call predecessors, (621), 147 states have return successors, (669), 579 states have call predecessors, (669), 616 states have call successors, (669) [2021-11-19 13:23:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4944 transitions. [2021-11-19 13:23:19,480 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4944 transitions. Word has length 129 [2021-11-19 13:23:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:19,481 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 4944 transitions. [2021-11-19 13:23:19,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4944 transitions. [2021-11-19 13:23:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:23:19,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:19,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:19,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:19,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:19,713 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash 677248839, now seen corresponding path program 1 times [2021-11-19 13:23:19,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:19,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996700592] [2021-11-19 13:23:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:19,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:19,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:19,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:19,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:23:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:20,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:21,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:21,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996700592] [2021-11-19 13:23:21,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996700592] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:21,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:21,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:23:21,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377670727] [2021-11-19 13:23:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:21,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:21,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:21,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:21,108 INFO L87 Difference]: Start difference. First operand 3051 states and 4944 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:22,244 INFO L93 Difference]: Finished difference Result 6117 states and 10068 transitions. [2021-11-19 13:23:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-19 13:23:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:22,279 INFO L225 Difference]: With dead ends: 6117 [2021-11-19 13:23:22,279 INFO L226 Difference]: Without dead ends: 3111 [2021-11-19 13:23:22,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:22,312 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 804 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:22,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2182 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:23:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-11-19 13:23:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3111. [2021-11-19 13:23:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2332 states have (on average 1.588336192109777) internal successors, (3704), 2423 states have internal predecessors, (3704), 621 states have call successors, (621), 141 states have call predecessors, (621), 157 states have return successors, (675), 579 states have call predecessors, (675), 616 states have call successors, (675) [2021-11-19 13:23:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5000 transitions. [2021-11-19 13:23:22,565 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5000 transitions. Word has length 131 [2021-11-19 13:23:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:22,565 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5000 transitions. [2021-11-19 13:23:22,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5000 transitions. [2021-11-19 13:23:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:23:22,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:22,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:22,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:22,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:22,791 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1165257971, now seen corresponding path program 1 times [2021-11-19 13:23:22,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:22,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736860798] [2021-11-19 13:23:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:22,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:22,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:22,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:23:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:23,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:23:24,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736860798] [2021-11-19 13:23:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736860798] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:24,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:24,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:23:24,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375847539] [2021-11-19 13:23:24,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:24,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:24,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:24,293 INFO L87 Difference]: Start difference. First operand 3111 states and 5000 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:25,217 INFO L93 Difference]: Finished difference Result 6247 states and 10180 transitions. [2021-11-19 13:23:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-19 13:23:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:25,250 INFO L225 Difference]: With dead ends: 6247 [2021-11-19 13:23:25,251 INFO L226 Difference]: Without dead ends: 3181 [2021-11-19 13:23:25,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:25,269 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 813 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:25,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 2182 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:23:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-19 13:23:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 3181. [2021-11-19 13:23:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2392 states have (on average 1.5735785953177257) internal successors, (3764), 2483 states have internal predecessors, (3764), 621 states have call successors, (621), 151 states have call predecessors, (621), 167 states have return successors, (681), 579 states have call predecessors, (681), 616 states have call successors, (681) [2021-11-19 13:23:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5066 transitions. [2021-11-19 13:23:25,557 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5066 transitions. Word has length 133 [2021-11-19 13:23:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:25,557 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5066 transitions. [2021-11-19 13:23:25,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:23:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5066 transitions. [2021-11-19 13:23:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:23:25,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:25,566 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:25,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:25,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:25,791 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1462667079, now seen corresponding path program 1 times [2021-11-19 13:23:25,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:25,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148263131] [2021-11-19 13:23:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:25,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:25,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:25,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:25,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:23:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:26,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:23:26,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:23:26,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:23:27,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:27,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148263131] [2021-11-19 13:23:27,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148263131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:27,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1288117613] [2021-11-19 13:23:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:27,976 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:27,983 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:28,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:23:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:28,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:28,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:29,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1288117613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:29,510 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:23:29,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:23:29,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384186077] [2021-11-19 13:23:29,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:29,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:29,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:23:29,513 INFO L87 Difference]: Start difference. First operand 3181 states and 5066 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:23:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:32,747 INFO L93 Difference]: Finished difference Result 8682 states and 14071 transitions. [2021-11-19 13:23:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:23:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 135 [2021-11-19 13:23:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:32,810 INFO L225 Difference]: With dead ends: 8682 [2021-11-19 13:23:32,810 INFO L226 Difference]: Without dead ends: 5546 [2021-11-19 13:23:32,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:23:32,828 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 1918 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:32,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 1606 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 13:23:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-11-19 13:23:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5313. [2021-11-19 13:23:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 3939 states have (on average 1.5686722518405687) internal successors, (6179), 4114 states have internal predecessors, (6179), 1094 states have call successors, (1094), 237 states have call predecessors, (1094), 279 states have return successors, (1296), 1042 states have call predecessors, (1296), 1089 states have call successors, (1296) [2021-11-19 13:23:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 8569 transitions. [2021-11-19 13:23:33,346 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 8569 transitions. Word has length 135 [2021-11-19 13:23:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:33,347 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 8569 transitions. [2021-11-19 13:23:33,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:23:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 8569 transitions. [2021-11-19 13:23:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:23:33,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:33,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:33,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:33,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:33,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:33,780 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1902241725, now seen corresponding path program 1 times [2021-11-19 13:23:33,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:33,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753430332] [2021-11-19 13:23:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:33,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:33,782 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:33,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:23:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:23:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:23:34,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:23:36,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:36,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753430332] [2021-11-19 13:23:36,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753430332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:36,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1155406985] [2021-11-19 13:23:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:36,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:36,129 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:36,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:23:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:36,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:36,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:36,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:37,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1155406985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:37,593 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:23:37,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:23:37,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131209065] [2021-11-19 13:23:37,594 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:37,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:37,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:23:37,597 INFO L87 Difference]: Start difference. First operand 5313 states and 8569 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:23:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:40,496 INFO L93 Difference]: Finished difference Result 15802 states and 26268 transitions. [2021-11-19 13:23:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:23:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 136 [2021-11-19 13:23:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:40,593 INFO L225 Difference]: With dead ends: 15802 [2021-11-19 13:23:40,594 INFO L226 Difference]: Without dead ends: 10534 [2021-11-19 13:23:40,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:23:40,624 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 1922 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:40,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1999 Valid, 1552 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:23:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10534 states. [2021-11-19 13:23:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10534 to 10045. [2021-11-19 13:23:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 7308 states have (on average 1.5622605363984674) internal successors, (11417), 7686 states have internal predecessors, (11417), 2213 states have call successors, (2213), 409 states have call predecessors, (2213), 523 states have return successors, (2968), 2153 states have call predecessors, (2968), 2208 states have call successors, (2968) [2021-11-19 13:23:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 16598 transitions. [2021-11-19 13:23:41,555 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 16598 transitions. Word has length 136 [2021-11-19 13:23:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:41,556 INFO L470 AbstractCegarLoop]: Abstraction has 10045 states and 16598 transitions. [2021-11-19 13:23:41,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:23:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 16598 transitions. [2021-11-19 13:23:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:23:41,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:41,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:41,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:41,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:41,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:41,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1159771657, now seen corresponding path program 1 times [2021-11-19 13:23:41,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:41,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587097568] [2021-11-19 13:23:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:41,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:41,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:41,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:41,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:23:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:42,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:23:42,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:23:42,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:23:44,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587097568] [2021-11-19 13:23:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587097568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127415533] [2021-11-19 13:23:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:44,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:44,165 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:44,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:23:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:44,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:44,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:45,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [127415533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:45,568 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:23:45,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:23:45,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403335638] [2021-11-19 13:23:45,568 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:45,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:45,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:23:45,571 INFO L87 Difference]: Start difference. First operand 10045 states and 16598 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:23:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:49,070 INFO L93 Difference]: Finished difference Result 31804 states and 55282 transitions. [2021-11-19 13:23:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:23:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 137 [2021-11-19 13:23:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:49,246 INFO L225 Difference]: With dead ends: 31804 [2021-11-19 13:23:49,246 INFO L226 Difference]: Without dead ends: 21804 [2021-11-19 13:23:49,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:23:49,312 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 1910 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:49,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 1560 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:23:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21804 states. [2021-11-19 13:23:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21804 to 20801. [2021-11-19 13:23:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20801 states, 14808 states have (on average 1.5544975688816856) internal successors, (23019), 15683 states have internal predecessors, (23019), 4929 states have call successors, (4929), 753 states have call predecessors, (4929), 1063 states have return successors, (7783), 4889 states have call predecessors, (7783), 4924 states have call successors, (7783) [2021-11-19 13:23:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20801 states to 20801 states and 35731 transitions. [2021-11-19 13:23:51,738 INFO L78 Accepts]: Start accepts. Automaton has 20801 states and 35731 transitions. Word has length 137 [2021-11-19 13:23:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:51,740 INFO L470 AbstractCegarLoop]: Abstraction has 20801 states and 35731 transitions. [2021-11-19 13:23:51,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:23:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20801 states and 35731 transitions. [2021-11-19 13:23:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 13:23:51,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:51,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:51,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:51,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:52,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:52,166 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1592909893, now seen corresponding path program 1 times [2021-11-19 13:23:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:52,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54053168] [2021-11-19 13:23:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:52,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:52,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:52,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:23:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:23:52,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:23:53,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:23:54,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:54,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54053168] [2021-11-19 13:23:54,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54053168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:54,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [657275621] [2021-11-19 13:23:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:54,578 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:54,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:54,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:54,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:23:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:55,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:23:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [657275621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:56,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:23:56,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:23:56,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201233183] [2021-11-19 13:23:56,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:56,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:56,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:23:56,065 INFO L87 Difference]: Start difference. First operand 20801 states and 35731 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:24:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:01,730 INFO L93 Difference]: Finished difference Result 68642 states and 128232 transitions. [2021-11-19 13:24:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:24:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 138 [2021-11-19 13:24:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:02,244 INFO L225 Difference]: With dead ends: 68642 [2021-11-19 13:24:02,244 INFO L226 Difference]: Without dead ends: 47886 [2021-11-19 13:24:02,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:24:02,434 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 2487 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:02,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2562 Valid, 1443 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 13:24:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47886 states. [2021-11-19 13:24:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47886 to 45937. [2021-11-19 13:24:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45937 states, 31964 states have (on average 1.5457702415217118) internal successors, (49409), 34072 states have internal predecessors, (49409), 11689 states have call successors, (11689), 1441 states have call predecessors, (11689), 2283 states have return successors, (22500), 11797 states have call predecessors, (22500), 11684 states have call successors, (22500) [2021-11-19 13:24:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45937 states to 45937 states and 83598 transitions. [2021-11-19 13:24:08,590 INFO L78 Accepts]: Start accepts. Automaton has 45937 states and 83598 transitions. Word has length 138 [2021-11-19 13:24:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:08,591 INFO L470 AbstractCegarLoop]: Abstraction has 45937 states and 83598 transitions. [2021-11-19 13:24:08,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:24:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 45937 states and 83598 transitions. [2021-11-19 13:24:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:24:08,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:08,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:08,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:08,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:09,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:09,014 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2135297227, now seen corresponding path program 1 times [2021-11-19 13:24:09,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:09,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935136522] [2021-11-19 13:24:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:09,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:09,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:09,021 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:09,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:24:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:24:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:24:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:24:10,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:10,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935136522] [2021-11-19 13:24:10,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935136522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:24:10,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585516546] [2021-11-19 13:24:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:10,961 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:24:10,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:24:10,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 13:24:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:24:11,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:24:11,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:24:12,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585516546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:12,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:24:12,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:24:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921036246] [2021-11-19 13:24:12,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:12,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:24:12,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:24:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:24:12,498 INFO L87 Difference]: Start difference. First operand 45937 states and 83598 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:24:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:23,448 INFO L93 Difference]: Finished difference Result 155630 states and 325397 transitions. [2021-11-19 13:24:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:24:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 139 [2021-11-19 13:24:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:24,860 INFO L225 Difference]: With dead ends: 155630 [2021-11-19 13:24:24,860 INFO L226 Difference]: Without dead ends: 109589 [2021-11-19 13:24:25,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:24:25,202 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 2492 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2566 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:25,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2566 Valid, 1442 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 13:24:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109589 states. [2021-11-19 13:24:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109589 to 106281. [2021-11-19 13:24:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106281 states, 72313 states have (on average 1.5364180714394369) internal successors, (111103), 77514 states have internal predecessors, (111103), 28874 states have call successors, (28874), 2804 states have call predecessors, (28874), 5093 states have return successors, (70221), 29601 states have call predecessors, (70221), 28869 states have call successors, (70221) [2021-11-19 13:24:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106281 states to 106281 states and 210198 transitions. [2021-11-19 13:24:38,228 INFO L78 Accepts]: Start accepts. Automaton has 106281 states and 210198 transitions. Word has length 139 [2021-11-19 13:24:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:38,229 INFO L470 AbstractCegarLoop]: Abstraction has 106281 states and 210198 transitions. [2021-11-19 13:24:38,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 5 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:24:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 106281 states and 210198 transitions. [2021-11-19 13:24:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 13:24:38,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:38,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:38,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-19 13:24:38,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:38,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:38,678 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 463498933, now seen corresponding path program 1 times [2021-11-19 13:24:38,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:38,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195789084] [2021-11-19 13:24:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:38,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:38,681 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:38,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cae0c66-6d54-48fb-b35d-e3fcd33affd6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:24:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:24:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 13:24:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 13:24:40,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:40,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195789084] [2021-11-19 13:24:40,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195789084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:40,984 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:40,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 13:24:40,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020366235] [2021-11-19 13:24:40,985 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:40,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:24:40,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:24:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:24:40,987 INFO L87 Difference]: Start difference. First operand 106281 states and 210198 transitions. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 12 states have internal predecessors, (156), 6 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 10 states have call predecessors, (32), 5 states have call successors, (32)