./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.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_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/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_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/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_633fb5e4-925f-4574-acb3-d1cad6551611/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 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:20:27,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:20:27,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:20:27,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:20:27,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:20:27,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:20:27,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:20:27,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:20:27,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:20:27,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:20:27,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:20:27,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:20:27,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:20:27,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:20:27,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:20:27,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:20:27,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:20:27,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:20:27,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:20:27,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:20:27,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:20:27,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:20:27,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:20:27,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:20:27,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:20:27,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:20:27,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:20:27,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:20:27,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:20:27,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:20:27,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:20:27,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:20:27,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:20:27,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:20:27,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:20:27,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:20:27,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:20:27,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:20:27,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:20:27,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:20:27,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:20:27,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:20:27,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:20:27,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:20:27,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:20:27,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:20:27,462 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:20:27,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:20:27,463 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:20:27,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:20:27,463 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:20:27,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:20:27,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:20:27,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:20:27,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:20:27,466 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:20:27,466 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:20:27,466 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:20:27,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:20:27,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:20:27,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:20:27,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:20:27,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:20:27,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:20:27,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:20:27,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:20:27,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:20:27,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:20:27,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:20:27,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:20:27,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:20:27,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:20:27,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:20:27,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:20:27,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:20:27,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:20:27,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:20:27,474 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:20:27,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:20:27,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:20:27,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:20:27,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:20:27,476 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_633fb5e4-925f-4574-acb3-d1cad6551611/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 [2021-11-19 14:20:27,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:20:27,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:20:27,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:20:27,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:20:27,888 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:20:27,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-19 14:20:27,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/7804cc11e/1399f8e38fd84386b6d50e9c9f4fbd79/FLAG562cf95a7 [2021-11-19 14:20:28,632 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:20:28,633 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-19 14:20:28,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/7804cc11e/1399f8e38fd84386b6d50e9c9f4fbd79/FLAG562cf95a7 [2021-11-19 14:20:28,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/7804cc11e/1399f8e38fd84386b6d50e9c9f4fbd79 [2021-11-19 14:20:28,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:20:28,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:20:28,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:20:28,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:20:28,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:20:28,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:20:28" (1/1) ... [2021-11-19 14:20:28,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68659b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:28, skipping insertion in model container [2021-11-19 14:20:28,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:20:28" (1/1) ... [2021-11-19 14:20:28,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:20:28,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:20:29,559 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_633fb5e4-925f-4574-acb3-d1cad6551611/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-19 14:20:29,634 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:20:29,659 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:20:29,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bd200a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:29, skipping insertion in model container [2021-11-19 14:20:29,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:20:29,661 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:20:29,663 INFO L158 Benchmark]: Toolchain (without parser) took 839.69ms. Allocated memory is still 109.1MB. Free memory was 68.1MB in the beginning and 68.6MB in the end (delta: -422.7kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:20:29,663 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:20:29,665 INFO L158 Benchmark]: CACSL2BoogieTranslator took 831.48ms. Allocated memory is still 109.1MB. Free memory was 67.9MB in the beginning and 68.9MB in the end (delta: -940.8kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:20:29,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 831.48ms. Allocated memory is still 109.1MB. Free memory was 67.9MB in the beginning and 68.9MB in the end (delta: -940.8kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1155]: 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_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/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_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/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_633fb5e4-925f-4574-acb3-d1cad6551611/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 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:20:32,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:20:32,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:20:32,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:20:32,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:20:32,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:20:32,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:20:32,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:20:32,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:20:32,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:20:32,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:20:32,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:20:32,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:20:32,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:20:32,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:20:32,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:20:32,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:20:32,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:20:32,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:20:32,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:20:32,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:20:32,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:20:32,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:20:32,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:20:32,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:20:32,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:20:32,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:20:32,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:20:32,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:20:32,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:20:32,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:20:32,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:20:32,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:20:32,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:20:32,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:20:32,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:20:32,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:20:32,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:20:32,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:20:32,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:20:32,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:20:32,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:20:32,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:20:32,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:20:32,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:20:32,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:20:32,543 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:20:32,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:20:32,543 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:20:32,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:20:32,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:20:32,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:20:32,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:20:32,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:20:32,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:20:32,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:20:32,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:20:32,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:20:32,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:20:32,549 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:20:32,549 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:20:32,549 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:20:32,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:20:32,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:20:32,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:20:32,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:20:32,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:20:32,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:20:32,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:20:32,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:20:32,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:20:32,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:20:32,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:20:32,552 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:20:32,553 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:20:32,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:20:32,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:20:32,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:20:32,554 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_633fb5e4-925f-4574-acb3-d1cad6551611/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 [2021-11-19 14:20:33,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:20:33,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:20:33,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:20:33,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:20:33,136 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:20:33,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-19 14:20:33,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/612c7ecb4/f715683e6b944d22886a38c270a06042/FLAG7ebf57bec [2021-11-19 14:20:33,979 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:20:33,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-19 14:20:34,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/612c7ecb4/f715683e6b944d22886a38c270a06042/FLAG7ebf57bec [2021-11-19 14:20:34,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/data/612c7ecb4/f715683e6b944d22886a38c270a06042 [2021-11-19 14:20:34,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:20:34,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:20:34,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:20:34,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:20:34,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:20:34,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:20:34" (1/1) ... [2021-11-19 14:20:34,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a30642c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:34, skipping insertion in model container [2021-11-19 14:20:34,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:20:34" (1/1) ... [2021-11-19 14:20:34,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:20:34,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:20:35,028 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_633fb5e4-925f-4574-acb3-d1cad6551611/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-19 14:20:35,135 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:20:35,162 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:20:35,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:20:35,282 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_633fb5e4-925f-4574-acb3-d1cad6551611/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-19 14:20:35,324 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:20:35,336 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:20:35,453 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_633fb5e4-925f-4574-acb3-d1cad6551611/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-19 14:20:35,496 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:20:35,557 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:20:35,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35 WrapperNode [2021-11-19 14:20:35,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:20:35,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:20:35,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:20:35,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:20:35,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,735 INFO L137 Inliner]: procedures = 153, calls = 282, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1231 [2021-11-19 14:20:35,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:20:35,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:20:35,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:20:35,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:20:35,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:20:35,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:20:35,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:20:35,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:20:35,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (1/1) ... [2021-11-19 14:20:35,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:20:35,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:20:35,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:20:35,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:20:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-19 14:20:36,019 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-19 14:20:36,020 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-19 14:20:36,020 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-19 14:20:36,021 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-19 14:20:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-19 14:20:36,021 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-19 14:20:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-19 14:20:36,021 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-19 14:20:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-19 14:20:36,022 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-19 14:20:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-19 14:20:36,022 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-19 14:20:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-19 14:20:36,023 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-19 14:20:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-19 14:20:36,023 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-19 14:20:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-19 14:20:36,023 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-19 14:20:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-19 14:20:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-19 14:20:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-19 14:20:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-19 14:20:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-19 14:20:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-19 14:20:36,025 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-19 14:20:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-19 14:20:36,025 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-19 14:20:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-19 14:20:36,025 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-19 14:20:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-19 14:20:36,026 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-19 14:20:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-19 14:20:36,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-19 14:20:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-19 14:20:36,027 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-19 14:20:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-19 14:20:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-19 14:20:36,028 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-19 14:20:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-19 14:20:36,028 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-19 14:20:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-19 14:20:36,028 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-19 14:20:36,029 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-19 14:20:36,029 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-19 14:20:36,029 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-19 14:20:36,029 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-19 14:20:36,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:20:36,030 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-19 14:20:36,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-19 14:20:36,030 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-19 14:20:36,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-19 14:20:36,030 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-19 14:20:36,031 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-19 14:20:36,031 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-19 14:20:36,031 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-19 14:20:36,031 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-19 14:20:36,031 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-19 14:20:36,031 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-19 14:20:36,032 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-19 14:20:36,032 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-19 14:20:36,032 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-19 14:20:36,032 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-19 14:20:36,032 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-19 14:20:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-19 14:20:36,033 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-19 14:20:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:20:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-19 14:20:36,033 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-19 14:20:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-19 14:20:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-19 14:20:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-19 14:20:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-19 14:20:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-19 14:20:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-19 14:20:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-19 14:20:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-19 14:20:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-19 14:20:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-19 14:20:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-19 14:20:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-19 14:20:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-19 14:20:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-19 14:20:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-19 14:20:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-19 14:20:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-19 14:20:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-19 14:20:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-19 14:20:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-19 14:20:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:20:36,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:20:36,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:20:36,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:20:37,799 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:20:37,824 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:20:37,824 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:20:37,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:20:37 BoogieIcfgContainer [2021-11-19 14:20:37,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:20:37,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:20:37,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:20:37,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:20:37,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:20:34" (1/3) ... [2021-11-19 14:20:37,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dafe31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:20:37, skipping insertion in model container [2021-11-19 14:20:37,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:20:35" (2/3) ... [2021-11-19 14:20:37,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dafe31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:20:37, skipping insertion in model container [2021-11-19 14:20:37,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:20:37" (3/3) ... [2021-11-19 14:20:37,839 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_productSimulator.cil.c [2021-11-19 14:20:37,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:20:37,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:20:37,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:20:37,926 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:20:37,927 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:20:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 446 states have (on average 1.515695067264574) internal successors, (676), 466 states have internal predecessors, (676), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-19 14:20:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:20:38,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:38,032 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 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] [2021-11-19 14:20:38,033 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2015100890, now seen corresponding path program 1 times [2021-11-19 14:20:38,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:38,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466516970] [2021-11-19 14:20:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:38,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:38,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:38,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:20:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:38,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:20:38,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:20:38,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:20:39,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:39,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466516970] [2021-11-19 14:20:39,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466516970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:39,443 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:39,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:20:39,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080702820] [2021-11-19 14:20:39,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:39,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:20:39,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:20:39,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:20:39,492 INFO L87 Difference]: Start difference. First operand has 600 states, 446 states have (on average 1.515695067264574) internal successors, (676), 466 states have internal predecessors, (676), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:39,603 INFO L93 Difference]: Finished difference Result 931 states and 1373 transitions. [2021-11-19 14:20:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:20:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 156 [2021-11-19 14:20:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:39,634 INFO L225 Difference]: With dead ends: 931 [2021-11-19 14:20:39,635 INFO L226 Difference]: Without dead ends: 593 [2021-11-19 14:20:39,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:20:39,651 INFO L933 BasicCegarLoop]: 890 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, 890 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:39,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-19 14:20:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-19 14:20:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 440 states have (on average 1.5113636363636365) internal successors, (665), 459 states have internal predecessors, (665), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 14:20:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 882 transitions. [2021-11-19 14:20:39,792 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 882 transitions. Word has length 156 [2021-11-19 14:20:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:39,795 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 882 transitions. [2021-11-19 14:20:39,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 882 transitions. [2021-11-19 14:20:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:20:39,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:39,810 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:39,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:20:40,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:40,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:40,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1644639793, now seen corresponding path program 1 times [2021-11-19 14:20:40,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:40,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025374164] [2021-11-19 14:20:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:40,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:40,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:40,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:20:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:20:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:20:41,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:20:41,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:41,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025374164] [2021-11-19 14:20:41,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025374164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:41,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:41,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:20:41,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574853615] [2021-11-19 14:20:41,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:41,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:20:41,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:20:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:20:41,478 INFO L87 Difference]: Start difference. First operand 593 states and 882 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:20:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:41,681 INFO L93 Difference]: Finished difference Result 1150 states and 1708 transitions. [2021-11-19 14:20:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:20:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 157 [2021-11-19 14:20:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:41,700 INFO L225 Difference]: With dead ends: 1150 [2021-11-19 14:20:41,700 INFO L226 Difference]: Without dead ends: 593 [2021-11-19 14:20:41,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:20:41,711 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 3 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:41,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-19 14:20:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-19 14:20:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 440 states have (on average 1.4954545454545454) internal successors, (658), 459 states have internal predecessors, (658), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 14:20:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 875 transitions. [2021-11-19 14:20:41,819 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 875 transitions. Word has length 157 [2021-11-19 14:20:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:41,822 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 875 transitions. [2021-11-19 14:20:41,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:20:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 875 transitions. [2021-11-19 14:20:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 14:20:41,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:41,835 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 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] [2021-11-19 14:20:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:42,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:42,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1683806924, now seen corresponding path program 1 times [2021-11-19 14:20:42,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:42,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820237929] [2021-11-19 14:20:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:42,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:42,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:42,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:20:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:20:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-19 14:20:42,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 14:20:43,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:43,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820237929] [2021-11-19 14:20:43,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820237929] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:20:43,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:20:43,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 14:20:43,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939608129] [2021-11-19 14:20:43,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:43,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:20:43,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:20:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:20:43,448 INFO L87 Difference]: Start difference. First operand 593 states and 875 transitions. Second operand has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:20:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:43,637 INFO L93 Difference]: Finished difference Result 1132 states and 1678 transitions. [2021-11-19 14:20:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:20:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 162 [2021-11-19 14:20:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:43,648 INFO L225 Difference]: With dead ends: 1132 [2021-11-19 14:20:43,650 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 14:20:43,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:20:43,659 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 196 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4953 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:43,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 4953 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:20:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 14:20:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-19 14:20:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 442 states have (on average 1.493212669683258) internal successors, (660), 462 states have internal predecessors, (660), 109 states have call successors, (109), 43 states have call predecessors, (109), 45 states have return successors, (112), 108 states have call predecessors, (112), 108 states have call successors, (112) [2021-11-19 14:20:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 881 transitions. [2021-11-19 14:20:43,735 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 881 transitions. Word has length 162 [2021-11-19 14:20:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:43,738 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 881 transitions. [2021-11-19 14:20:43,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:20:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 881 transitions. [2021-11-19 14:20:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:20:43,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:43,744 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:43,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:43,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:43,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1511105544, now seen corresponding path program 1 times [2021-11-19 14:20:43,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:43,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172336247] [2021-11-19 14:20:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:43,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:43,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:44,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:20:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:20:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 14:20:44,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 14:20:45,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:45,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172336247] [2021-11-19 14:20:45,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172336247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:45,362 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:45,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:20:45,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395339187] [2021-11-19 14:20:45,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:45,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:20:45,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:20:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:20:45,365 INFO L87 Difference]: Start difference. First operand 597 states and 881 transitions. Second operand has 10 states, 8 states have (on average 14.625) internal successors, (117), 10 states have internal predecessors, (117), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-19 14:20:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:45,614 INFO L93 Difference]: Finished difference Result 1118 states and 1658 transitions. [2021-11-19 14:20:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:20:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.625) internal successors, (117), 10 states have internal predecessors, (117), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) Word has length 163 [2021-11-19 14:20:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:45,622 INFO L225 Difference]: With dead ends: 1118 [2021-11-19 14:20:45,622 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:20:45,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:20:45,626 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 384 mSDsluCounter, 3239 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 4102 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:45,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 4102 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:20:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:20:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-19 14:20:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 443 states have (on average 1.492099322799097) internal successors, (661), 463 states have internal predecessors, (661), 109 states have call successors, (109), 43 states have call predecessors, (109), 46 states have return successors, (113), 109 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-19 14:20:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 883 transitions. [2021-11-19 14:20:45,666 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 883 transitions. Word has length 163 [2021-11-19 14:20:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:45,667 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 883 transitions. [2021-11-19 14:20:45,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.625) internal successors, (117), 10 states have internal predecessors, (117), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-19 14:20:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 883 transitions. [2021-11-19 14:20:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:20:45,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:45,674 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:20:45,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:45,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:45,890 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -123130025, now seen corresponding path program 1 times [2021-11-19 14:20:45,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:45,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021067892] [2021-11-19 14:20:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:45,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:45,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:45,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:45,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:20:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:20:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 14:20:46,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 14:20:47,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:47,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021067892] [2021-11-19 14:20:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021067892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:47,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:47,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:20:47,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179037962] [2021-11-19 14:20:47,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:47,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:20:47,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:20:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:20:47,365 INFO L87 Difference]: Start difference. First operand 599 states and 883 transitions. Second operand has 10 states, 8 states have (on average 14.875) internal successors, (119), 10 states have internal predecessors, (119), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-19 14:20:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:47,617 INFO L93 Difference]: Finished difference Result 1122 states and 1664 transitions. [2021-11-19 14:20:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:20:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.875) internal successors, (119), 10 states have internal predecessors, (119), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) Word has length 164 [2021-11-19 14:20:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:47,626 INFO L225 Difference]: With dead ends: 1122 [2021-11-19 14:20:47,627 INFO L226 Difference]: Without dead ends: 603 [2021-11-19 14:20:47,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:20:47,631 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 190 mSDsluCounter, 3906 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 4771 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:47,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 4771 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:20:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-19 14:20:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-11-19 14:20:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 444 states have (on average 1.490990990990991) internal successors, (662), 465 states have internal predecessors, (662), 109 states have call successors, (109), 43 states have call predecessors, (109), 47 states have return successors, (116), 109 states have call predecessors, (116), 108 states have call successors, (116) [2021-11-19 14:20:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 887 transitions. [2021-11-19 14:20:47,674 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 887 transitions. Word has length 164 [2021-11-19 14:20:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:47,677 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 887 transitions. [2021-11-19 14:20:47,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.875) internal successors, (119), 10 states have internal predecessors, (119), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-19 14:20:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 887 transitions. [2021-11-19 14:20:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:20:47,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:47,685 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:47,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:47,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:47,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash -153684035, now seen corresponding path program 1 times [2021-11-19 14:20:47,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:47,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511093432] [2021-11-19 14:20:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:47,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:47,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:47,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:47,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:20:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:48,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:48,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:48,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511093432] [2021-11-19 14:20:48,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511093432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:48,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:48,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:20:48,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714682340] [2021-11-19 14:20:49,000 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:49,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:20:49,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:49,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:20:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:20:49,001 INFO L87 Difference]: Start difference. First operand 601 states and 887 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:49,131 INFO L93 Difference]: Finished difference Result 1055 states and 1559 transitions. [2021-11-19 14:20:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:20:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 165 [2021-11-19 14:20:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:49,139 INFO L225 Difference]: With dead ends: 1055 [2021-11-19 14:20:49,140 INFO L226 Difference]: Without dead ends: 730 [2021-11-19 14:20:49,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:20:49,143 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 176 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:49,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 2649 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:20:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-19 14:20:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 722. [2021-11-19 14:20:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 548 states have (on average 1.5237226277372262) internal successors, (835), 571 states have internal predecessors, (835), 126 states have call successors, (126), 43 states have call predecessors, (126), 47 states have return successors, (133), 126 states have call predecessors, (133), 125 states have call successors, (133) [2021-11-19 14:20:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1094 transitions. [2021-11-19 14:20:49,192 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1094 transitions. Word has length 165 [2021-11-19 14:20:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:49,197 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1094 transitions. [2021-11-19 14:20:49,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1094 transitions. [2021-11-19 14:20:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:20:49,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:49,205 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:20:49,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:49,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:49,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1880528848, now seen corresponding path program 1 times [2021-11-19 14:20:49,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:49,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027252725] [2021-11-19 14:20:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:49,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:49,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:49,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:20:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:50,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:50,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:50,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027252725] [2021-11-19 14:20:50,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027252725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:50,701 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:50,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:20:50,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788697788] [2021-11-19 14:20:50,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:50,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:20:50,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:50,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:20:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:50,707 INFO L87 Difference]: Start difference. First operand 722 states and 1094 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:50,775 INFO L93 Difference]: Finished difference Result 1427 states and 2181 transitions. [2021-11-19 14:20:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:20:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 177 [2021-11-19 14:20:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:50,785 INFO L225 Difference]: With dead ends: 1427 [2021-11-19 14:20:50,785 INFO L226 Difference]: Without dead ends: 822 [2021-11-19 14:20:50,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:50,793 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 173 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:50,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1720 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-11-19 14:20:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 814. [2021-11-19 14:20:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 626 states have (on average 1.535143769968051) internal successors, (961), 651 states have internal predecessors, (961), 140 states have call successors, (140), 43 states have call predecessors, (140), 47 states have return successors, (147), 140 states have call predecessors, (147), 139 states have call successors, (147) [2021-11-19 14:20:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1248 transitions. [2021-11-19 14:20:50,857 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1248 transitions. Word has length 177 [2021-11-19 14:20:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:50,858 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1248 transitions. [2021-11-19 14:20:50,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1248 transitions. [2021-11-19 14:20:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 14:20:50,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:50,866 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:20:50,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:51,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:51,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1123450082, now seen corresponding path program 1 times [2021-11-19 14:20:51,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:51,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988090998] [2021-11-19 14:20:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:51,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:51,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:51,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:20:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:51,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:51,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:52,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:52,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988090998] [2021-11-19 14:20:52,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988090998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:52,448 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:52,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:20:52,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646638467] [2021-11-19 14:20:52,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:52,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:20:52,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:20:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:52,451 INFO L87 Difference]: Start difference. First operand 814 states and 1248 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:52,532 INFO L93 Difference]: Finished difference Result 1703 states and 2652 transitions. [2021-11-19 14:20:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:20:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 178 [2021-11-19 14:20:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:52,549 INFO L225 Difference]: With dead ends: 1703 [2021-11-19 14:20:52,549 INFO L226 Difference]: Without dead ends: 1017 [2021-11-19 14:20:52,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:52,554 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 171 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:52,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1755 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-11-19 14:20:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1009. [2021-11-19 14:20:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 790 states have (on average 1.558227848101266) internal successors, (1231), 819 states have internal predecessors, (1231), 171 states have call successors, (171), 43 states have call predecessors, (171), 47 states have return successors, (178), 171 states have call predecessors, (178), 170 states have call successors, (178) [2021-11-19 14:20:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1580 transitions. [2021-11-19 14:20:52,629 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1580 transitions. Word has length 178 [2021-11-19 14:20:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:52,630 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1580 transitions. [2021-11-19 14:20:52,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1580 transitions. [2021-11-19 14:20:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:20:52,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:52,639 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:20:52,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:52,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:52,854 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 590542485, now seen corresponding path program 1 times [2021-11-19 14:20:52,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:52,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257596603] [2021-11-19 14:20:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:52,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:52,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:52,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:20:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:53,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:54,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:54,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257596603] [2021-11-19 14:20:54,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257596603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:54,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:54,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:20:54,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712921999] [2021-11-19 14:20:54,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:54,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:20:54,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:20:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:54,014 INFO L87 Difference]: Start difference. First operand 1009 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:54,099 INFO L93 Difference]: Finished difference Result 2274 states and 3630 transitions. [2021-11-19 14:20:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:20:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 179 [2021-11-19 14:20:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:54,113 INFO L225 Difference]: With dead ends: 2274 [2021-11-19 14:20:54,113 INFO L226 Difference]: Without dead ends: 1401 [2021-11-19 14:20:54,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:54,120 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 169 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:54,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1766 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-19 14:20:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1393. [2021-11-19 14:20:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1116 states have (on average 1.586021505376344) internal successors, (1770), 1153 states have internal predecessors, (1770), 229 states have call successors, (229), 43 states have call predecessors, (229), 47 states have return successors, (236), 229 states have call predecessors, (236), 228 states have call successors, (236) [2021-11-19 14:20:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2235 transitions. [2021-11-19 14:20:54,215 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2235 transitions. Word has length 179 [2021-11-19 14:20:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:54,216 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2235 transitions. [2021-11-19 14:20:54,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2235 transitions. [2021-11-19 14:20:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:20:54,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:54,228 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:54,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:54,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:54,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2138147086, now seen corresponding path program 1 times [2021-11-19 14:20:54,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:54,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359768417] [2021-11-19 14:20:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:54,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:54,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:54,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:20:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:54,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:55,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:55,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:55,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359768417] [2021-11-19 14:20:55,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359768417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:55,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:55,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:20:55,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528154204] [2021-11-19 14:20:55,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:55,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:20:55,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:20:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:20:55,687 INFO L87 Difference]: Start difference. First operand 1393 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:55,816 INFO L93 Difference]: Finished difference Result 2583 states and 4154 transitions. [2021-11-19 14:20:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:20:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 179 [2021-11-19 14:20:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:55,832 INFO L225 Difference]: With dead ends: 2583 [2021-11-19 14:20:55,833 INFO L226 Difference]: Without dead ends: 1401 [2021-11-19 14:20:55,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:20:55,840 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 128 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:55,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2798 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-19 14:20:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1393. [2021-11-19 14:20:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1116 states have (on average 1.582437275985663) internal successors, (1766), 1153 states have internal predecessors, (1766), 229 states have call successors, (229), 43 states have call predecessors, (229), 47 states have return successors, (236), 229 states have call predecessors, (236), 228 states have call successors, (236) [2021-11-19 14:20:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2231 transitions. [2021-11-19 14:20:55,952 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2231 transitions. Word has length 179 [2021-11-19 14:20:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:55,953 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2231 transitions. [2021-11-19 14:20:55,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2231 transitions. [2021-11-19 14:20:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 14:20:55,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:55,967 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:20:55,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:56,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:56,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:56,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1986337367, now seen corresponding path program 1 times [2021-11-19 14:20:56,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:56,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586323996] [2021-11-19 14:20:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:56,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:56,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:56,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:20:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:57,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:20:57,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:57,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586323996] [2021-11-19 14:20:57,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586323996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:57,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:57,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:20:57,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187442433] [2021-11-19 14:20:57,395 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:57,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:20:57,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:20:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:57,397 INFO L87 Difference]: Start difference. First operand 1393 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:57,550 INFO L93 Difference]: Finished difference Result 3369 states and 5494 transitions. [2021-11-19 14:20:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:20:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 180 [2021-11-19 14:20:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:57,576 INFO L225 Difference]: With dead ends: 3369 [2021-11-19 14:20:57,576 INFO L226 Difference]: Without dead ends: 2123 [2021-11-19 14:20:57,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:20:57,584 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 167 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:57,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1755 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:20:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-19 14:20:57,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2115. [2021-11-19 14:20:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 1742 states have (on average 1.6090700344431688) internal successors, (2803), 1795 states have internal predecessors, (2803), 325 states have call successors, (325), 43 states have call predecessors, (325), 47 states have return successors, (332), 325 states have call predecessors, (332), 324 states have call successors, (332) [2021-11-19 14:20:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3460 transitions. [2021-11-19 14:20:57,776 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3460 transitions. Word has length 180 [2021-11-19 14:20:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:57,780 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3460 transitions. [2021-11-19 14:20:57,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:20:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3460 transitions. [2021-11-19 14:20:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 14:20:57,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:57,799 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:58,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:58,014 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash -516442741, now seen corresponding path program 1 times [2021-11-19 14:20:58,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:58,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420853207] [2021-11-19 14:20:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:58,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:58,016 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:58,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:20:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:20:58,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 14:20:58,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:20:59,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:59,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420853207] [2021-11-19 14:20:59,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420853207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:59,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:59,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:20:59,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643757283] [2021-11-19 14:20:59,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:59,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:20:59,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:20:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:20:59,206 INFO L87 Difference]: Start difference. First operand 2115 states and 3460 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 14:20:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:59,827 INFO L93 Difference]: Finished difference Result 4022 states and 6613 transitions. [2021-11-19 14:20:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:20:59,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 180 [2021-11-19 14:20:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:59,848 INFO L225 Difference]: With dead ends: 4022 [2021-11-19 14:20:59,848 INFO L226 Difference]: Without dead ends: 2117 [2021-11-19 14:20:59,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:20:59,859 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 1406 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:59,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 883 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:20:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-11-19 14:21:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 2117. [2021-11-19 14:21:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 1744 states have (on average 1.602637614678899) internal successors, (2795), 1796 states have internal predecessors, (2795), 324 states have call successors, (324), 44 states have call predecessors, (324), 48 states have return successors, (331), 324 states have call predecessors, (331), 323 states have call successors, (331) [2021-11-19 14:21:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3450 transitions. [2021-11-19 14:21:00,030 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3450 transitions. Word has length 180 [2021-11-19 14:21:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:00,033 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3450 transitions. [2021-11-19 14:21:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 14:21:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3450 transitions. [2021-11-19 14:21:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-19 14:21:00,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:00,054 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:21:00,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:00,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:00,275 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:00,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2049043650, now seen corresponding path program 1 times [2021-11-19 14:21:00,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:00,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323378810] [2021-11-19 14:21:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:00,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:00,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:00,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:21:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:21:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:01,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:01,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:01,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323378810] [2021-11-19 14:21:01,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323378810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:01,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:01,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:21:01,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545546817] [2021-11-19 14:21:01,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:01,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:21:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:21:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:01,510 INFO L87 Difference]: Start difference. First operand 2117 states and 3450 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:21:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:01,711 INFO L93 Difference]: Finished difference Result 5459 states and 9031 transitions. [2021-11-19 14:21:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:21:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 181 [2021-11-19 14:21:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:01,746 INFO L225 Difference]: With dead ends: 5459 [2021-11-19 14:21:01,746 INFO L226 Difference]: Without dead ends: 3503 [2021-11-19 14:21:01,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:01,793 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 164 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:01,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1745 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:21:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-11-19 14:21:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3495. [2021-11-19 14:21:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2954 states have (on average 1.6235612728503723) internal successors, (4796), 3038 states have internal predecessors, (4796), 492 states have call successors, (492), 44 states have call predecessors, (492), 48 states have return successors, (499), 492 states have call predecessors, (499), 491 states have call successors, (499) [2021-11-19 14:21:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5787 transitions. [2021-11-19 14:21:02,138 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5787 transitions. Word has length 181 [2021-11-19 14:21:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:02,139 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 5787 transitions. [2021-11-19 14:21:02,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:21:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5787 transitions. [2021-11-19 14:21:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 14:21:02,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:02,170 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 14:21:02,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:02,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:02,394 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash -878352478, now seen corresponding path program 1 times [2021-11-19 14:21:02,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:02,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106120769] [2021-11-19 14:21:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:02,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:02,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:02,397 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:02,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:21:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:02,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:21:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:03,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:03,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:03,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106120769] [2021-11-19 14:21:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106120769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:03,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:03,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:21:03,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696481874] [2021-11-19 14:21:03,495 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:03,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:21:03,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:21:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:03,497 INFO L87 Difference]: Start difference. First operand 3495 states and 5787 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:21:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:03,817 INFO L93 Difference]: Finished difference Result 9452 states and 15817 transitions. [2021-11-19 14:21:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:21:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 182 [2021-11-19 14:21:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:03,893 INFO L225 Difference]: With dead ends: 9452 [2021-11-19 14:21:03,893 INFO L226 Difference]: Without dead ends: 6129 [2021-11-19 14:21:03,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:03,908 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 162 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:03,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1758 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:21:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2021-11-19 14:21:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 6121. [2021-11-19 14:21:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6121 states, 5196 states have (on average 1.6314472671285605) internal successors, (8477), 5344 states have internal predecessors, (8477), 876 states have call successors, (876), 44 states have call predecessors, (876), 48 states have return successors, (883), 876 states have call predecessors, (883), 875 states have call successors, (883) [2021-11-19 14:21:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6121 states to 6121 states and 10236 transitions. [2021-11-19 14:21:04,424 INFO L78 Accepts]: Start accepts. Automaton has 6121 states and 10236 transitions. Word has length 182 [2021-11-19 14:21:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:04,425 INFO L470 AbstractCegarLoop]: Abstraction has 6121 states and 10236 transitions. [2021-11-19 14:21:04,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:21:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6121 states and 10236 transitions. [2021-11-19 14:21:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 14:21:04,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:04,477 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:04,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:04,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:04,697 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash 475611706, now seen corresponding path program 1 times [2021-11-19 14:21:04,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:04,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024380878] [2021-11-19 14:21:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:04,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:04,701 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:21:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:05,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:05,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:05,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024380878] [2021-11-19 14:21:05,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024380878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:05,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673665305] [2021-11-19 14:21:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:05,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:05,971 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:05,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:21:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 14:21:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:21:07,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:08,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [673665305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:08,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:21:08,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22, 20] imperfect sequences [5, 5] total 46 [2021-11-19 14:21:08,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332378789] [2021-11-19 14:21:08,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:08,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 14:21:08,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 14:21:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:21:08,772 INFO L87 Difference]: Start difference. First operand 6121 states and 10236 transitions. Second operand has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 30 states have internal predecessors, (176), 18 states have call successors, (48), 13 states have call predecessors, (48), 8 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-19 14:21:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:22,186 INFO L93 Difference]: Finished difference Result 7604 states and 12438 transitions. [2021-11-19 14:21:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-19 14:21:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 30 states have internal predecessors, (176), 18 states have call successors, (48), 13 states have call predecessors, (48), 8 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) Word has length 182 [2021-11-19 14:21:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:22,241 INFO L225 Difference]: With dead ends: 7604 [2021-11-19 14:21:22,241 INFO L226 Difference]: Without dead ends: 7288 [2021-11-19 14:21:22,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1050, Invalid=12290, Unknown=0, NotChecked=0, Total=13340 [2021-11-19 14:21:22,254 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 5959 mSDsluCounter, 23341 mSDsCounter, 0 mSdLazyCounter, 6507 mSolverCounterSat, 2890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5970 SdHoareTripleChecker+Valid, 24400 SdHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2890 IncrementalHoareTripleChecker+Valid, 6507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:22,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5970 Valid, 24400 Invalid, 9397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2890 Valid, 6507 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-19 14:21:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7288 states. [2021-11-19 14:21:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7288 to 7114. [2021-11-19 14:21:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 5888 states have (on average 1.6032608695652173) internal successors, (9440), 6081 states have internal predecessors, (9440), 1094 states have call successors, (1094), 113 states have call predecessors, (1094), 131 states have return successors, (1182), 1105 states have call predecessors, (1182), 1087 states have call successors, (1182) [2021-11-19 14:21:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 11716 transitions. [2021-11-19 14:21:22,871 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 11716 transitions. Word has length 182 [2021-11-19 14:21:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 7114 states and 11716 transitions. [2021-11-19 14:21:22,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 30 states have internal predecessors, (176), 18 states have call successors, (48), 13 states have call predecessors, (48), 8 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-19 14:21:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 11716 transitions. [2021-11-19 14:21:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:21:22,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:22,919 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:22,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:23,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:23,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:23,344 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash -422663872, now seen corresponding path program 1 times [2021-11-19 14:21:23,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:23,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13106741] [2021-11-19 14:21:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:23,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:23,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:23,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:23,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:21:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:24,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:24,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:24,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13106741] [2021-11-19 14:21:24,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13106741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:24,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356184380] [2021-11-19 14:21:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:24,614 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:24,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:24,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:21:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:21:25,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:25,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:26,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356184380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:26,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:21:26,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [5, 5] total 11 [2021-11-19 14:21:26,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625642312] [2021-11-19 14:21:26,068 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:26,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:21:26,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:21:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:21:26,070 INFO L87 Difference]: Start difference. First operand 7114 states and 11716 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-19 14:21:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:26,817 INFO L93 Difference]: Finished difference Result 15332 states and 25149 transitions. [2021-11-19 14:21:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:21:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 183 [2021-11-19 14:21:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:26,899 INFO L225 Difference]: With dead ends: 15332 [2021-11-19 14:21:26,900 INFO L226 Difference]: Without dead ends: 14038 [2021-11-19 14:21:26,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:21:26,918 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 744 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 3675 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:26,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 3675 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:21:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14038 states. [2021-11-19 14:21:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14038 to 13994. [2021-11-19 14:21:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13994 states, 11597 states have (on average 1.6051565059929291) internal successors, (18615), 11978 states have internal predecessors, (18615), 2145 states have call successors, (2145), 218 states have call predecessors, (2145), 251 states have return successors, (2315), 2163 states have call predecessors, (2315), 2131 states have call successors, (2315) [2021-11-19 14:21:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13994 states to 13994 states and 23075 transitions. [2021-11-19 14:21:28,270 INFO L78 Accepts]: Start accepts. Automaton has 13994 states and 23075 transitions. Word has length 183 [2021-11-19 14:21:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:28,271 INFO L470 AbstractCegarLoop]: Abstraction has 13994 states and 23075 transitions. [2021-11-19 14:21:28,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-19 14:21:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 13994 states and 23075 transitions. [2021-11-19 14:21:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:21:28,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:28,335 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:28,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:28,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:28,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:28,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash 244301683, now seen corresponding path program 1 times [2021-11-19 14:21:28,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:28,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874246172] [2021-11-19 14:21:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:28,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:28,754 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:28,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:21:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:29,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:29,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:30,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:30,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874246172] [2021-11-19 14:21:30,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874246172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:30,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [357194180] [2021-11-19 14:21:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:30,024 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:30,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:30,025 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:30,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:21:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:30,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:21:30,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:30,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:31,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [357194180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:31,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:21:31,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [5, 5] total 23 [2021-11-19 14:21:31,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131860805] [2021-11-19 14:21:31,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:31,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:21:31,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:21:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:21:31,368 INFO L87 Difference]: Start difference. First operand 13994 states and 23075 transitions. Second operand has 17 states, 15 states have (on average 7.866666666666666) internal successors, (118), 13 states have internal predecessors, (118), 9 states have call successors, (32), 6 states have call predecessors, (32), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:21:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:32,767 INFO L93 Difference]: Finished difference Result 16959 states and 27532 transitions. [2021-11-19 14:21:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:21:32,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 7.866666666666666) internal successors, (118), 13 states have internal predecessors, (118), 9 states have call successors, (32), 6 states have call predecessors, (32), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) Word has length 183 [2021-11-19 14:21:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:32,848 INFO L225 Difference]: With dead ends: 16959 [2021-11-19 14:21:32,849 INFO L226 Difference]: Without dead ends: 14360 [2021-11-19 14:21:32,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-19 14:21:32,872 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 156 mSDsluCounter, 12316 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 13203 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:32,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 13203 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:21:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14360 states. [2021-11-19 14:21:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14360 to 14356. [2021-11-19 14:21:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14356 states, 11813 states have (on average 1.5998476254973335) internal successors, (18899), 12224 states have internal predecessors, (18899), 2269 states have call successors, (2269), 234 states have call predecessors, (2269), 273 states have return successors, (2503), 2291 states have call predecessors, (2503), 2247 states have call successors, (2503) [2021-11-19 14:21:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14356 states to 14356 states and 23671 transitions. [2021-11-19 14:21:34,187 INFO L78 Accepts]: Start accepts. Automaton has 14356 states and 23671 transitions. Word has length 183 [2021-11-19 14:21:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 14356 states and 23671 transitions. [2021-11-19 14:21:34,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 7.866666666666666) internal successors, (118), 13 states have internal predecessors, (118), 9 states have call successors, (32), 6 states have call predecessors, (32), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:21:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14356 states and 23671 transitions. [2021-11-19 14:21:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:21:34,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:34,253 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:34,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:34,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:21:34,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:34,668 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash -934831442, now seen corresponding path program 1 times [2021-11-19 14:21:34,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:34,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329041932] [2021-11-19 14:21:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:34,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:34,674 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:34,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:21:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:35,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:35,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:35,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329041932] [2021-11-19 14:21:35,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329041932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:35,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1344285571] [2021-11-19 14:21:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:35,876 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:35,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:35,877 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:35,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:21:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:36,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:21:36,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:36,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1344285571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:36,992 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:21:36,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 12 [2021-11-19 14:21:36,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424622264] [2021-11-19 14:21:36,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:36,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:21:36,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:21:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:21:36,994 INFO L87 Difference]: Start difference. First operand 14356 states and 23671 transitions. Second operand has 6 states, 5 states have (on average 25.2) internal successors, (126), 6 states have internal predecessors, (126), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:21:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:38,051 INFO L93 Difference]: Finished difference Result 15110 states and 24702 transitions. [2021-11-19 14:21:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:21:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 25.2) internal successors, (126), 6 states have internal predecessors, (126), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 185 [2021-11-19 14:21:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:38,131 INFO L225 Difference]: With dead ends: 15110 [2021-11-19 14:21:38,131 INFO L226 Difference]: Without dead ends: 13374 [2021-11-19 14:21:38,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:21:38,151 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 9 mSDsluCounter, 3420 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4282 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:38,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4282 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:21:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13374 states. [2021-11-19 14:21:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13374 to 13336. [2021-11-19 14:21:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13336 states, 11125 states have (on average 1.6130337078651686) internal successors, (17945), 11478 states have internal predecessors, (17945), 2015 states have call successors, (2015), 166 states have call predecessors, (2015), 195 states have return successors, (2139), 2039 states have call predecessors, (2139), 1999 states have call successors, (2139) [2021-11-19 14:21:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13336 states to 13336 states and 22099 transitions. [2021-11-19 14:21:39,310 INFO L78 Accepts]: Start accepts. Automaton has 13336 states and 22099 transitions. Word has length 185 [2021-11-19 14:21:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:39,311 INFO L470 AbstractCegarLoop]: Abstraction has 13336 states and 22099 transitions. [2021-11-19 14:21:39,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 25.2) internal successors, (126), 6 states have internal predecessors, (126), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:21:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 13336 states and 22099 transitions. [2021-11-19 14:21:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:21:39,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:39,382 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:39,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:39,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:39,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:39,798 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1847348143, now seen corresponding path program 1 times [2021-11-19 14:21:39,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:39,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635283236] [2021-11-19 14:21:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:39,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:39,802 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:39,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:21:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:40,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:40,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:41,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:41,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635283236] [2021-11-19 14:21:41,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635283236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:41,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [241867587] [2021-11-19 14:21:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:41,216 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:41,217 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:41,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 14:21:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:41,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:21:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:41,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:42,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [241867587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:42,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:21:42,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-19 14:21:42,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553090460] [2021-11-19 14:21:42,347 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:21:42,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:21:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:21:42,349 INFO L87 Difference]: Start difference. First operand 13336 states and 22099 transitions. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 8 states have internal predecessors, (115), 1 states have call successors, (29), 1 states have call predecessors, (29), 5 states have return successors, (23), 5 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-19 14:21:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:42,929 INFO L93 Difference]: Finished difference Result 13453 states and 22287 transitions. [2021-11-19 14:21:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:21:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 8 states have internal predecessors, (115), 1 states have call successors, (29), 1 states have call predecessors, (29), 5 states have return successors, (23), 5 states have call predecessors, (23), 1 states have call successors, (23) Word has length 185 [2021-11-19 14:21:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:42,990 INFO L225 Difference]: With dead ends: 13453 [2021-11-19 14:21:42,991 INFO L226 Difference]: Without dead ends: 13451 [2021-11-19 14:21:42,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:21:42,998 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 11 mSDsluCounter, 5224 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6099 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:42,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6099 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:21:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13451 states. [2021-11-19 14:21:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13451 to 13358. [2021-11-19 14:21:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13358 states, 11143 states have (on average 1.6120434353405726) internal successors, (17963), 11493 states have internal predecessors, (17963), 2015 states have call successors, (2015), 166 states have call predecessors, (2015), 199 states have return successors, (2158), 2046 states have call predecessors, (2158), 1999 states have call successors, (2158) [2021-11-19 14:21:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13358 states to 13358 states and 22136 transitions. [2021-11-19 14:21:44,256 INFO L78 Accepts]: Start accepts. Automaton has 13358 states and 22136 transitions. Word has length 185 [2021-11-19 14:21:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:44,257 INFO L470 AbstractCegarLoop]: Abstraction has 13358 states and 22136 transitions. [2021-11-19 14:21:44,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 8 states have internal predecessors, (115), 1 states have call successors, (29), 1 states have call predecessors, (29), 5 states have return successors, (23), 5 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-19 14:21:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 13358 states and 22136 transitions. [2021-11-19 14:21:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 14:21:44,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:44,317 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:44,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:44,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:44,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:44,738 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -155169327, now seen corresponding path program 1 times [2021-11-19 14:21:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:44,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860441883] [2021-11-19 14:21:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:44,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:44,743 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:44,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:21:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:21:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:45,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:21:46,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:46,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860441883] [2021-11-19 14:21:46,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860441883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:46,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205490258] [2021-11-19 14:21:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:46,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:46,056 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:46,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:21:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:21:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:21:46,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:21:47,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205490258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:47,178 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:21:47,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5] total 10 [2021-11-19 14:21:47,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279025182] [2021-11-19 14:21:47,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:47,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:21:47,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:21:47,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:21:47,181 INFO L87 Difference]: Start difference. First operand 13358 states and 22136 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:21:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:49,497 INFO L93 Difference]: Finished difference Result 39777 states and 66338 transitions. [2021-11-19 14:21:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:21:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 188 [2021-11-19 14:21:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:49,552 INFO L225 Difference]: With dead ends: 39777 [2021-11-19 14:21:49,553 INFO L226 Difference]: Without dead ends: 13248 [2021-11-19 14:21:49,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:21:49,617 INFO L933 BasicCegarLoop]: 1648 mSDtfsCounter, 1592 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:49,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 2932 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:21:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2021-11-19 14:21:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 13248. [2021-11-19 14:21:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 11075 states have (on average 1.6130925507900677) internal successors, (17865), 11414 states have internal predecessors, (17865), 1981 states have call successors, (1981), 164 states have call predecessors, (1981), 191 states have return successors, (2095), 1999 states have call predecessors, (2095), 1965 states have call successors, (2095) [2021-11-19 14:21:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 21941 transitions. [2021-11-19 14:21:50,644 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 21941 transitions. Word has length 188 [2021-11-19 14:21:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:50,645 INFO L470 AbstractCegarLoop]: Abstraction has 13248 states and 21941 transitions. [2021-11-19 14:21:50,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:21:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 21941 transitions. [2021-11-19 14:21:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-19 14:21:50,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:50,902 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:50,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:51,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:51,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:51,323 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash 428230456, now seen corresponding path program 1 times [2021-11-19 14:21:51,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:51,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283195628] [2021-11-19 14:21:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:51,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:51,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:51,328 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:51,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:21:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:21:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 14:21:52,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 14:21:52,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:52,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283195628] [2021-11-19 14:21:52,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283195628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:52,617 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:52,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:21:52,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464142472] [2021-11-19 14:21:52,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:21:52,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:21:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:52,621 INFO L87 Difference]: Start difference. First operand 13248 states and 21941 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-19 14:21:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:53,636 INFO L93 Difference]: Finished difference Result 26063 states and 43313 transitions. [2021-11-19 14:21:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:21:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 202 [2021-11-19 14:21:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:53,709 INFO L225 Difference]: With dead ends: 26063 [2021-11-19 14:21:53,709 INFO L226 Difference]: Without dead ends: 12845 [2021-11-19 14:21:53,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:53,757 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 717 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:53,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 882 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:21:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12845 states. [2021-11-19 14:21:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12845 to 12837. [2021-11-19 14:21:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12837 states, 10787 states have (on average 1.619912858069899) internal successors, (17474), 11102 states have internal predecessors, (17474), 1883 states have call successors, (1883), 152 states have call predecessors, (1883), 166 states have return successors, (1955), 1883 states have call predecessors, (1955), 1867 states have call successors, (1955) [2021-11-19 14:21:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12837 states to 12837 states and 21312 transitions. [2021-11-19 14:21:54,893 INFO L78 Accepts]: Start accepts. Automaton has 12837 states and 21312 transitions. Word has length 202 [2021-11-19 14:21:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:54,894 INFO L470 AbstractCegarLoop]: Abstraction has 12837 states and 21312 transitions. [2021-11-19 14:21:54,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-19 14:21:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 12837 states and 21312 transitions. [2021-11-19 14:21:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 14:21:54,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:54,939 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:54,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:55,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:55,140 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1284689971, now seen corresponding path program 1 times [2021-11-19 14:21:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:55,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305259490] [2021-11-19 14:21:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:55,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:55,143 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:55,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:21:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:21:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 14:21:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 14:21:56,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:56,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305259490] [2021-11-19 14:21:56,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305259490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:56,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:56,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:21:56,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167525029] [2021-11-19 14:21:56,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:56,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:21:56,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:21:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:56,196 INFO L87 Difference]: Start difference. First operand 12837 states and 21312 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-19 14:21:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:56,963 INFO L93 Difference]: Finished difference Result 25619 states and 42552 transitions. [2021-11-19 14:21:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:21:56,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 209 [2021-11-19 14:21:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:57,021 INFO L225 Difference]: With dead ends: 25619 [2021-11-19 14:21:57,021 INFO L226 Difference]: Without dead ends: 12834 [2021-11-19 14:21:57,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:21:57,055 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 795 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:57,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 859 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:21:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2021-11-19 14:21:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12826. [2021-11-19 14:21:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 10783 states have (on average 1.5478994713901513) internal successors, (16691), 10835 states have internal predecessors, (16691), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 162 states have return successors, (1946), 1878 states have call predecessors, (1946), 1864 states have call successors, (1946) [2021-11-19 14:21:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 20517 transitions. [2021-11-19 14:21:58,304 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 20517 transitions. Word has length 209 [2021-11-19 14:21:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:58,305 INFO L470 AbstractCegarLoop]: Abstraction has 12826 states and 20517 transitions. [2021-11-19 14:21:58,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-19 14:21:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 20517 transitions. [2021-11-19 14:21:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-19 14:21:58,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:58,334 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:58,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:58,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:58,535 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:58,536 INFO L85 PathProgramCache]: Analyzing trace with hash -128917904, now seen corresponding path program 1 times [2021-11-19 14:21:58,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:58,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331593926] [2021-11-19 14:21:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:58,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:58,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:58,538 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:58,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:21:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:21:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:21:59,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 14:21:59,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:59,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331593926] [2021-11-19 14:21:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331593926] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:21:59,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:21:59,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-19 14:21:59,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214825470] [2021-11-19 14:21:59,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:59,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:21:59,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:59,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:21:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:21:59,942 INFO L87 Difference]: Start difference. First operand 12826 states and 20517 transitions. Second operand has 8 states, 6 states have (on average 24.166666666666668) internal successors, (145), 8 states have internal predecessors, (145), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:22:00,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:00,934 INFO L93 Difference]: Finished difference Result 25589 states and 40956 transitions. [2021-11-19 14:22:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:22:00,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 24.166666666666668) internal successors, (145), 8 states have internal predecessors, (145), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) Word has length 232 [2021-11-19 14:22:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:00,972 INFO L225 Difference]: With dead ends: 25589 [2021-11-19 14:22:00,972 INFO L226 Difference]: Without dead ends: 12830 [2021-11-19 14:22:01,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:22:01,007 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 361 mSDsluCounter, 4555 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5382 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:01,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5382 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:22:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12830 states. [2021-11-19 14:22:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12830 to 12828. [2021-11-19 14:22:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12828 states, 10784 states have (on average 1.5478486646884273) internal successors, (16692), 10837 states have internal predecessors, (16692), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 163 states have return successors, (1947), 1878 states have call predecessors, (1947), 1864 states have call successors, (1947) [2021-11-19 14:22:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12828 states to 12828 states and 20519 transitions. [2021-11-19 14:22:02,366 INFO L78 Accepts]: Start accepts. Automaton has 12828 states and 20519 transitions. Word has length 232 [2021-11-19 14:22:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:02,367 INFO L470 AbstractCegarLoop]: Abstraction has 12828 states and 20519 transitions. [2021-11-19 14:22:02,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 24.166666666666668) internal successors, (145), 8 states have internal predecessors, (145), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:22:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 12828 states and 20519 transitions. [2021-11-19 14:22:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-19 14:22:02,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:02,396 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:02,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:02,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:02,598 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2103220780, now seen corresponding path program 1 times [2021-11-19 14:22:02,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:02,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140807428] [2021-11-19 14:22:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:02,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:02,602 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:02,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:22:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:22:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 14:22:03,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:22:03,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:03,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140807428] [2021-11-19 14:22:03,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140807428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:22:03,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:22:03,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 14:22:03,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333365645] [2021-11-19 14:22:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:03,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:22:03,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:22:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:22:03,995 INFO L87 Difference]: Start difference. First operand 12828 states and 20519 transitions. Second operand has 6 states, 5 states have (on average 29.0) internal successors, (145), 6 states have internal predecessors, (145), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:22:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:05,044 INFO L93 Difference]: Finished difference Result 25592 states and 41024 transitions. [2021-11-19 14:22:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:22:05,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 29.0) internal successors, (145), 6 states have internal predecessors, (145), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 234 [2021-11-19 14:22:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:05,077 INFO L225 Difference]: With dead ends: 25592 [2021-11-19 14:22:05,078 INFO L226 Difference]: Without dead ends: 12834 [2021-11-19 14:22:05,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:22:05,096 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 359 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 3728 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:05,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 3728 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:22:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2021-11-19 14:22:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12830. [2021-11-19 14:22:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 10785 states have (on average 1.5477978674084376) internal successors, (16693), 10839 states have internal predecessors, (16693), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 164 states have return successors, (1982), 1878 states have call predecessors, (1982), 1864 states have call successors, (1982) [2021-11-19 14:22:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 20555 transitions. [2021-11-19 14:22:06,057 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 20555 transitions. Word has length 234 [2021-11-19 14:22:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:06,057 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 20555 transitions. [2021-11-19 14:22:06,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 29.0) internal successors, (145), 6 states have internal predecessors, (145), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:22:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 20555 transitions. [2021-11-19 14:22:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-19 14:22:06,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:06,202 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:06,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-19 14:22:06,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:06,404 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1235842453, now seen corresponding path program 1 times [2021-11-19 14:22:06,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:06,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896199868] [2021-11-19 14:22:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:06,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:06,407 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:06,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:22:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:22:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-19 14:22:07,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:22:07,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:07,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896199868] [2021-11-19 14:22:07,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896199868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:07,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:07,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:22:07,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117784989] [2021-11-19 14:22:07,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:07,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:22:07,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:22:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:22:07,993 INFO L87 Difference]: Start difference. First operand 12830 states and 20555 transitions. Second operand has 12 states, 8 states have (on average 23.125) internal successors, (185), 12 states have internal predecessors, (185), 6 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (44), 3 states have call predecessors, (44), 6 states have call successors, (44) [2021-11-19 14:22:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:09,133 INFO L93 Difference]: Finished difference Result 25578 states and 41008 transitions. [2021-11-19 14:22:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:22:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 23.125) internal successors, (185), 12 states have internal predecessors, (185), 6 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (44), 3 states have call predecessors, (44), 6 states have call successors, (44) Word has length 242 [2021-11-19 14:22:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:09,170 INFO L225 Difference]: With dead ends: 25578 [2021-11-19 14:22:09,171 INFO L226 Difference]: Without dead ends: 12830 [2021-11-19 14:22:09,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:22:09,191 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 357 mSDsluCounter, 6658 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 7485 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:09,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 7485 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:22:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12830 states. [2021-11-19 14:22:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12830 to 12828. [2021-11-19 14:22:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12828 states, 10784 states have (on average 1.547755934718101) internal successors, (16691), 10837 states have internal predecessors, (16691), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 163 states have return successors, (1981), 1878 states have call predecessors, (1981), 1864 states have call successors, (1981) [2021-11-19 14:22:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12828 states to 12828 states and 20552 transitions. [2021-11-19 14:22:10,163 INFO L78 Accepts]: Start accepts. Automaton has 12828 states and 20552 transitions. Word has length 242 [2021-11-19 14:22:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:10,163 INFO L470 AbstractCegarLoop]: Abstraction has 12828 states and 20552 transitions. [2021-11-19 14:22:10,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 23.125) internal successors, (185), 12 states have internal predecessors, (185), 6 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (44), 3 states have call predecessors, (44), 6 states have call successors, (44) [2021-11-19 14:22:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 12828 states and 20552 transitions. [2021-11-19 14:22:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-19 14:22:10,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:10,193 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:10,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:10,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:10,409 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -821005703, now seen corresponding path program 1 times [2021-11-19 14:22:10,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:10,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308701794] [2021-11-19 14:22:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:10,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:10,412 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:10,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:22:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:22:10,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 14:22:11,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 14:22:11,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:11,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308701794] [2021-11-19 14:22:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308701794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:11,878 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:11,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:22:11,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985031362] [2021-11-19 14:22:11,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:11,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:22:11,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:22:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:22:11,889 INFO L87 Difference]: Start difference. First operand 12828 states and 20552 transitions. Second operand has 12 states, 8 states have (on average 22.0) internal successors, (176), 12 states have internal predecessors, (176), 6 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) [2021-11-19 14:22:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:12,937 INFO L93 Difference]: Finished difference Result 25578 states and 41008 transitions. [2021-11-19 14:22:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:22:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 22.0) internal successors, (176), 12 states have internal predecessors, (176), 6 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) Word has length 228 [2021-11-19 14:22:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:12,976 INFO L225 Difference]: With dead ends: 25578 [2021-11-19 14:22:12,976 INFO L226 Difference]: Without dead ends: 12832 [2021-11-19 14:22:12,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:22:12,999 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 361 mSDsluCounter, 4195 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:13,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5023 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:22:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12832 states. [2021-11-19 14:22:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12832 to 12830. [2021-11-19 14:22:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 10785 states have (on average 1.5477051460361613) internal successors, (16692), 10839 states have internal predecessors, (16692), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 164 states have return successors, (1982), 1878 states have call predecessors, (1982), 1864 states have call successors, (1982) [2021-11-19 14:22:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 20554 transitions. [2021-11-19 14:22:13,874 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 20554 transitions. Word has length 228 [2021-11-19 14:22:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:13,875 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 20554 transitions. [2021-11-19 14:22:13,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 22.0) internal successors, (176), 12 states have internal predecessors, (176), 6 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) [2021-11-19 14:22:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 20554 transitions. [2021-11-19 14:22:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:22:13,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:13,905 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:13,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:14,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:14,106 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1578945377, now seen corresponding path program 1 times [2021-11-19 14:22:14,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:14,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339020327] [2021-11-19 14:22:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:14,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:14,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:14,109 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:14,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:22:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:22:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-19 14:22:14,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-19 14:22:15,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:15,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339020327] [2021-11-19 14:22:15,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339020327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:15,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:15,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:22:15,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123965180] [2021-11-19 14:22:15,464 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:15,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:22:15,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:22:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:22:15,466 INFO L87 Difference]: Start difference. First operand 12830 states and 20554 transitions. Second operand has 9 states, 7 states have (on average 26.142857142857142) internal successors, (183), 9 states have internal predecessors, (183), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-19 14:22:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:16,349 INFO L93 Difference]: Finished difference Result 25577 states and 41036 transitions. [2021-11-19 14:22:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:22:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 26.142857142857142) internal successors, (183), 9 states have internal predecessors, (183), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 244 [2021-11-19 14:22:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:16,408 INFO L225 Difference]: With dead ends: 25577 [2021-11-19 14:22:16,408 INFO L226 Difference]: Without dead ends: 12834 [2021-11-19 14:22:16,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:22:16,443 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 525 mSDsluCounter, 4364 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 5190 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:16,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 5190 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:22:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2021-11-19 14:22:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12830. [2021-11-19 14:22:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 10785 states have (on average 1.5477051460361613) internal successors, (16692), 10839 states have internal predecessors, (16692), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 164 states have return successors, (1981), 1878 states have call predecessors, (1981), 1864 states have call successors, (1981) [2021-11-19 14:22:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 20553 transitions. [2021-11-19 14:22:17,393 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 20553 transitions. Word has length 244 [2021-11-19 14:22:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:17,394 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 20553 transitions. [2021-11-19 14:22:17,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 26.142857142857142) internal successors, (183), 9 states have internal predecessors, (183), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-19 14:22:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 20553 transitions. [2021-11-19 14:22:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-19 14:22:17,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:17,424 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:17,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:17,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:17,625 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1585525176, now seen corresponding path program 1 times [2021-11-19 14:22:17,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:17,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828098104] [2021-11-19 14:22:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:17,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:17,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:17,628 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:17,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633fb5e4-925f-4574-acb3-d1cad6551611/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:22:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:18,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:22:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-19 14:22:18,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-19 14:22:19,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:19,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828098104] [2021-11-19 14:22:19,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828098104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:19,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:19,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:22:19,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036178129] [2021-11-19 14:22:19,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:19,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:22:19,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:22:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:22:19,076 INFO L87 Difference]: Start difference. First operand 12830 states and 20553 transitions. Second operand has 9 states, 7 states have (on average 26.428571428571427) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-19 14:22:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:20,331 INFO L93 Difference]: Finished difference Result 25579 states and 41072 transitions. [2021-11-19 14:22:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:22:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 26.428571428571427) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 245 [2021-11-19 14:22:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:20,382 INFO L225 Difference]: With dead ends: 25579 [2021-11-19 14:22:20,382 INFO L226 Difference]: Without dead ends: 12836 [2021-11-19 14:22:20,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:22:20,411 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 351 mSDsluCounter, 4185 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 5012 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:20,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 5012 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:22:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12836 states.