./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:49:26,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:49:26,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:49:26,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:49:26,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:49:26,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:49:26,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:49:26,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:49:26,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:49:26,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:49:26,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:49:26,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:49:26,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:49:26,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:49:26,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:49:26,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:49:26,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:49:26,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:49:26,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:49:26,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:49:26,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:49:26,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:49:26,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:49:26,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:49:26,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:49:26,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:49:26,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:49:26,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:49:26,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:49:26,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:49:26,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:49:26,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:49:26,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:49:26,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:49:26,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:49:26,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:49:26,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:49:26,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:49:26,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:49:26,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:49:26,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:49:26,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:49:26,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:49:26,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:49:26,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:49:26,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:49:26,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:49:26,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:49:26,698 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:49:26,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:49:26,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:49:26,699 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:49:26,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:49:26,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:49:26,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:49:26,700 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:49:26,700 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:49:26,700 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:49:26,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:49:26,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:49:26,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:49:26,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:49:26,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:49:26,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:49:26,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:49:26,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:49:26,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:49:26,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:49:26,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:49:26,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:49:26,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:49:26,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 [2021-11-02 22:49:26,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:49:26,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:49:26,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:49:26,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:49:26,987 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:49:26,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2021-11-02 22:49:27,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/data/1b179953b/e0863e8a4cdf49c58be0babc1234cd88/FLAG3dab02477 [2021-11-02 22:49:27,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:49:27,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2021-11-02 22:49:27,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/data/1b179953b/e0863e8a4cdf49c58be0babc1234cd88/FLAG3dab02477 [2021-11-02 22:49:27,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/data/1b179953b/e0863e8a4cdf49c58be0babc1234cd88 [2021-11-02 22:49:27,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:49:27,986 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:49:27,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:49:27,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:49:28,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:49:28,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:27" (1/1) ... [2021-11-02 22:49:28,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54665a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28, skipping insertion in model container [2021-11-02 22:49:28,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:27" (1/1) ... [2021-11-02 22:49:28,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:49:28,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:49:28,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:49:28,387 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:49:28,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:49:28,460 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:49:28,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28 WrapperNode [2021-11-02 22:49:28,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:49:28,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:49:28,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:49:28,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:49:28,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:49:28,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:49:28,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:49:28,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:49:28,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (1/1) ... [2021-11-02 22:49:28,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:49:28,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:28,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:49:28,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:49:28,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:49:28,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:49:28,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:49:28,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:49:28,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:49:28,644 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-02 22:49:28,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:49:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:49:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:49:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:49:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:49:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:49:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:49:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:49:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:49:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:49:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:49:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:49:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:49:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:49:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:49:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:49:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:49:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:49:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:49:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:49:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:49:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:49:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:49:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:49:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:49:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:49:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:49:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:49:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:49:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:49:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:49:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:49:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:49:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:49:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:49:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:49:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:49:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:49:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:49:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:49:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:49:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:49:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:49:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:49:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:49:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:49:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:49:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:49:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:49:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:49:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:49:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:49:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:49:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:49:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:49:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:49:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:49:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:49:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:49:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:49:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:49:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:49:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:49:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:49:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:49:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:49:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:49:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:49:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:49:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:49:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:49:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:49:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:49:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:49:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:49:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:49:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:49:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:49:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:49:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:49:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:49:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:49:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:49:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:49:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:49:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:49:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:49:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:49:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:49:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:49:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:49:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:49:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:49:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:49:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:49:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:49:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:49:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:49:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:49:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-02 22:49:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:49:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-02 22:49:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:49:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:49:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:49:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:49:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:49:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:49:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:49:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:49:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:49:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:49:29,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:49:29,386 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:49:29,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:29 BoogieIcfgContainer [2021-11-02 22:49:29,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:49:29,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:49:29,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:49:29,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:49:29,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:49:27" (1/3) ... [2021-11-02 22:49:29,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18527b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:29, skipping insertion in model container [2021-11-02 22:49:29,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:28" (2/3) ... [2021-11-02 22:49:29,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18527b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:29, skipping insertion in model container [2021-11-02 22:49:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:29" (3/3) ... [2021-11-02 22:49:29,397 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-1.i [2021-11-02 22:49:29,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:49:29,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-02 22:49:29,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:49:29,453 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-02 22:49:29,453 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-02 22:49:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:49:29,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:29,479 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:29,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash -127170297, now seen corresponding path program 1 times [2021-11-02 22:49:29,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:29,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874893642] [2021-11-02 22:49:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:29,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:29,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:29,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874893642] [2021-11-02 22:49:29,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874893642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:29,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:29,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:29,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662296445] [2021-11-02 22:49:29,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:29,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:29,843 INFO L87 Difference]: Start difference. First operand has 133 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:30,123 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-11-02 22:49:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:49:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:30,135 INFO L225 Difference]: With dead ends: 170 [2021-11-02 22:49:30,135 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 22:49:30,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 22:49:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-11-02 22:49:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-11-02 22:49:30,213 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 7 [2021-11-02 22:49:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:30,214 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-11-02 22:49:30,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-11-02 22:49:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:49:30,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:30,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:30,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:49:30,216 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash -127170296, now seen corresponding path program 1 times [2021-11-02 22:49:30,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:30,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009135959] [2021-11-02 22:49:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:30,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:30,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:30,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009135959] [2021-11-02 22:49:30,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009135959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:30,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:30,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:30,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260772357] [2021-11-02 22:49:30,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:30,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:30,351 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:30,609 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-11-02 22:49:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:49:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:30,614 INFO L225 Difference]: With dead ends: 128 [2021-11-02 22:49:30,614 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 22:49:30,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 22:49:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-02 22:49:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 119 states have internal predecessors, (125), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-11-02 22:49:30,642 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 7 [2021-11-02 22:49:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:30,643 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-11-02 22:49:30,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-11-02 22:49:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:49:30,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:30,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:30,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:49:30,645 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash -369177653, now seen corresponding path program 1 times [2021-11-02 22:49:30,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:30,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650587434] [2021-11-02 22:49:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:30,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:30,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:30,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650587434] [2021-11-02 22:49:30,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650587434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:30,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:30,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:30,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379912123] [2021-11-02 22:49:30,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:30,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:30,772 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:30,985 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2021-11-02 22:49:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 22:49:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:30,988 INFO L225 Difference]: With dead ends: 143 [2021-11-02 22:49:30,988 INFO L226 Difference]: Without dead ends: 143 [2021-11-02 22:49:30,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-02 22:49:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-11-02 22:49:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-11-02 22:49:31,012 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 10 [2021-11-02 22:49:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,013 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-11-02 22:49:31,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-11-02 22:49:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:49:31,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:31,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:49:31,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -369177652, now seen corresponding path program 1 times [2021-11-02 22:49:31,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:31,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131493556] [2021-11-02 22:49:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:31,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:31,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:31,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131493556] [2021-11-02 22:49:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131493556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:31,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:31,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:31,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777278670] [2021-11-02 22:49:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:31,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:31,102 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:31,301 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-02 22:49:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 22:49:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:31,303 INFO L225 Difference]: With dead ends: 129 [2021-11-02 22:49:31,303 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 22:49:31,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 22:49:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-11-02 22:49:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.8428571428571427) internal successors, (129), 120 states have internal predecessors, (129), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2021-11-02 22:49:31,309 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 10 [2021-11-02 22:49:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,310 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2021-11-02 22:49:31,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2021-11-02 22:49:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:49:31,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,311 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:31,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:49:31,311 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1763722802, now seen corresponding path program 1 times [2021-11-02 22:49:31,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:31,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241978603] [2021-11-02 22:49:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:31,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:31,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:31,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241978603] [2021-11-02 22:49:31,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241978603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:31,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:31,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:31,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044335795] [2021-11-02 22:49:31,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:31,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:31,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:31,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:31,370 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:31,553 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-11-02 22:49:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 22:49:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:31,555 INFO L225 Difference]: With dead ends: 122 [2021-11-02 22:49:31,555 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 22:49:31,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 22:49:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-02 22:49:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 115 states have internal predecessors, (124), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2021-11-02 22:49:31,560 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 16 [2021-11-02 22:49:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2021-11-02 22:49:31,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2021-11-02 22:49:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:49:31,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,562 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:31,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:49:31,563 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1763722803, now seen corresponding path program 1 times [2021-11-02 22:49:31,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:31,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293579268] [2021-11-02 22:49:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:31,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:31,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:31,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293579268] [2021-11-02 22:49:31,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293579268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:31,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:31,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:31,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530141407] [2021-11-02 22:49:31,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:31,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:31,628 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:31,793 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-11-02 22:49:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 22:49:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:31,795 INFO L225 Difference]: With dead ends: 117 [2021-11-02 22:49:31,795 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 22:49:31,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 22:49:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-02 22:49:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.7) internal successors, (119), 110 states have internal predecessors, (119), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2021-11-02 22:49:31,799 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 16 [2021-11-02 22:49:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,799 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2021-11-02 22:49:31,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2021-11-02 22:49:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:31,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,800 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:31,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:49:31,801 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1159167875, now seen corresponding path program 1 times [2021-11-02 22:49:31,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:31,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584919091] [2021-11-02 22:49:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:31,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:31,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:31,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584919091] [2021-11-02 22:49:31,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584919091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:31,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:31,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:31,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750379685] [2021-11-02 22:49:31,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:49:31,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:49:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:31,942 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:32,282 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2021-11-02 22:49:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:49:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:32,284 INFO L225 Difference]: With dead ends: 227 [2021-11-02 22:49:32,284 INFO L226 Difference]: Without dead ends: 227 [2021-11-02 22:49:32,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:49:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-02 22:49:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 151. [2021-11-02 22:49:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.6238532110091743) internal successors, (177), 143 states have internal predecessors, (177), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2021-11-02 22:49:32,289 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 17 [2021-11-02 22:49:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:32,290 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2021-11-02 22:49:32,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2021-11-02 22:49:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:49:32,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:32,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:32,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:49:32,291 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:32,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1159167874, now seen corresponding path program 1 times [2021-11-02 22:49:32,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:32,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147912050] [2021-11-02 22:49:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:32,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:32,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:32,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:32,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147912050] [2021-11-02 22:49:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147912050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:32,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:32,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:49:32,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94677473] [2021-11-02 22:49:32,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:49:32,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:49:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:32,478 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:32,741 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2021-11-02 22:49:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:49:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:49:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:32,743 INFO L225 Difference]: With dead ends: 177 [2021-11-02 22:49:32,743 INFO L226 Difference]: Without dead ends: 177 [2021-11-02 22:49:32,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:49:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-02 22:49:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-11-02 22:49:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 131 states have (on average 1.549618320610687) internal successors, (203), 166 states have internal predecessors, (203), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2021-11-02 22:49:32,749 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 17 [2021-11-02 22:49:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:32,749 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2021-11-02 22:49:32,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2021-11-02 22:49:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:49:32,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:32,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:32,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:49:32,751 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash -521946515, now seen corresponding path program 1 times [2021-11-02 22:49:32,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:32,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440812137] [2021-11-02 22:49:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:32,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:32,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:32,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:32,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440812137] [2021-11-02 22:49:32,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440812137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:32,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:49:32,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144320089] [2021-11-02 22:49:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:49:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:49:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:49:32,978 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:33,372 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2021-11-02 22:49:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:49:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:49:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:33,374 INFO L225 Difference]: With dead ends: 213 [2021-11-02 22:49:33,375 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 22:49:33,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:49:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 22:49:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 175. [2021-11-02 22:49:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 131 states have (on average 1.5419847328244274) internal successors, (202), 166 states have internal predecessors, (202), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-02 22:49:33,380 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 26 [2021-11-02 22:49:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:33,381 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-02 22:49:33,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-02 22:49:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:49:33,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:33,382 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:33,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:49:33,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:33,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1013125872, now seen corresponding path program 1 times [2021-11-02 22:49:33,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:33,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715567932] [2021-11-02 22:49:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:33,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:33,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:33,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715567932] [2021-11-02 22:49:33,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715567932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:33,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:33,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:49:33,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957470503] [2021-11-02 22:49:33,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:49:33,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:49:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:49:33,733 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:34,091 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2021-11-02 22:49:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:49:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-02 22:49:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:34,093 INFO L225 Difference]: With dead ends: 167 [2021-11-02 22:49:34,094 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 22:49:34,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:49:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 22:49:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-02 22:49:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 158 states have internal predecessors, (191), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2021-11-02 22:49:34,100 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 28 [2021-11-02 22:49:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:34,100 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2021-11-02 22:49:34,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:49:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2021-11-02 22:49:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:49:34,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:34,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:34,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:49:34,102 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1823572622, now seen corresponding path program 1 times [2021-11-02 22:49:34,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:34,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102286247] [2021-11-02 22:49:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:34,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:34,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:34,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102286247] [2021-11-02 22:49:34,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102286247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:34,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:34,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:49:34,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433967037] [2021-11-02 22:49:34,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:49:34,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:49:34,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:49:34,192 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:49:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:34,396 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2021-11-02 22:49:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:34,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-02 22:49:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:34,400 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:49:34,401 INFO L226 Difference]: Without dead ends: 159 [2021-11-02 22:49:34,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:49:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-02 22:49:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2021-11-02 22:49:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.5) internal successors, (153), 137 states have internal predecessors, (153), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2021-11-02 22:49:34,413 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 33 [2021-11-02 22:49:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:34,413 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2021-11-02 22:49:34,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:49:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2021-11-02 22:49:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:49:34,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:34,423 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:49:34,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:49:34,424 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash 157209059, now seen corresponding path program 1 times [2021-11-02 22:49:34,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:34,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17647320] [2021-11-02 22:49:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:34,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:34,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:34,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17647320] [2021-11-02 22:49:34,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17647320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:34,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514079883] [2021-11-02 22:49:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:34,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:34,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:34,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:49:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:49:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:35,539 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:49:35,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 22:49:35,551 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:49:35,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-02 22:49:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514079883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:35,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:35,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2021-11-02 22:49:35,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671363910] [2021-11-02 22:49:35,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:49:35,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:49:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:49:35,644 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:36,484 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-11-02 22:49:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:49:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-02 22:49:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:36,486 INFO L225 Difference]: With dead ends: 155 [2021-11-02 22:49:36,486 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 22:49:36,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:49:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 22:49:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-11-02 22:49:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 136 states have internal predecessors, (145), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2021-11-02 22:49:36,492 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 35 [2021-11-02 22:49:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:36,492 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2021-11-02 22:49:36,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2021-11-02 22:49:36,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:49:36,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:36,493 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:49:36,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:36,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:49:36,715 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash -983310407, now seen corresponding path program 1 times [2021-11-02 22:49:36,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:36,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303465371] [2021-11-02 22:49:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:36,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:36,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:36,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:36,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303465371] [2021-11-02 22:49:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303465371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662167254] [2021-11-02 22:49:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:36,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:36,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:36,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:49:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:37,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:49:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:37,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:49:37,365 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:49:37,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:49:37,538 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:49:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-02 22:49:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:37,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662167254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:37,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:37,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-02 22:49:37,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306955335] [2021-11-02 22:49:37,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:49:37,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:49:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:49:37,601 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:38,239 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2021-11-02 22:49:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:49:38,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-02 22:49:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:38,241 INFO L225 Difference]: With dead ends: 185 [2021-11-02 22:49:38,241 INFO L226 Difference]: Without dead ends: 185 [2021-11-02 22:49:38,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:49:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-02 22:49:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2021-11-02 22:49:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 137 states have internal predecessors, (148), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-11-02 22:49:38,249 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 36 [2021-11-02 22:49:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:38,249 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-11-02 22:49:38,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:49:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-11-02 22:49:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:49:38,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:38,251 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:49:38,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:38,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:49:38,451 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash -983310406, now seen corresponding path program 1 times [2021-11-02 22:49:38,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:38,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025820895] [2021-11-02 22:49:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:38,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:38,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:38,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025820895] [2021-11-02 22:49:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025820895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:38,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586012215] [2021-11-02 22:49:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:38,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:38,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:38,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:49:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:49:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:38,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:49:39,278 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:49:39,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2021-11-02 22:49:39,289 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:49:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-02 22:49:39,569 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:49:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-11-02 22:49:39,592 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 22:49:39,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-02 22:49:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:39,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586012215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:39,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:39,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-11-02 22:49:39,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351237638] [2021-11-02 22:49:39,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:49:39,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:49:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:49:39,712 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:40,452 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2021-11-02 22:49:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:49:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-11-02 22:49:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:40,454 INFO L225 Difference]: With dead ends: 175 [2021-11-02 22:49:40,454 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 22:49:40,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:49:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 22:49:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2021-11-02 22:49:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 104 states have (on average 1.3269230769230769) internal successors, (138), 128 states have internal predecessors, (138), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:49:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-11-02 22:49:40,460 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 36 [2021-11-02 22:49:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:40,460 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-11-02 22:49:40,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:49:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-11-02 22:49:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:49:40,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:40,461 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:49:40,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:40,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:49:40,662 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:40,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:40,662 INFO L85 PathProgramCache]: Analyzing trace with hash 351414952, now seen corresponding path program 1 times [2021-11-02 22:49:40,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:40,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020433543] [2021-11-02 22:49:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:40,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:40,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:40,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:49:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:41,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:41,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020433543] [2021-11-02 22:49:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020433543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:41,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749822637] [2021-11-02 22:49:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:41,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:41,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:41,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:41,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:49:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:49:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:41,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:49:41,601 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:49:41,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 22:49:41,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-02 22:49:42,067 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:49:42,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2021-11-02 22:49:42,213 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-02 22:49:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2021-11-02 22:49:44,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:49:44,477 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-02 22:49:44,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 64 [2021-11-02 22:49:44,840 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-02 22:49:44,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 91 [2021-11-02 22:49:45,014 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-02 22:49:45,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 56 [2021-11-02 22:49:45,433 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-02 22:49:45,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 65 [2021-11-02 22:49:45,651 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-02 22:49:45,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 74 [2021-11-02 22:49:45,853 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-11-02 22:49:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 55 [2021-11-02 22:49:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:45,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749822637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:45,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:45,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-11-02 22:49:45,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301310632] [2021-11-02 22:49:45,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:49:45,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:49:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:49:45,919 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:51:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:19,401 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2021-11-02 22:51:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:51:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2021-11-02 22:51:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:19,405 INFO L225 Difference]: With dead ends: 193 [2021-11-02 22:51:19,405 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 22:51:19,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=358, Invalid=1984, Unknown=10, NotChecked=0, Total=2352 [2021-11-02 22:51:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 22:51:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 136. [2021-11-02 22:51:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 104 states have (on average 1.3076923076923077) internal successors, (136), 127 states have internal predecessors, (136), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:51:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2021-11-02 22:51:19,413 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 44 [2021-11-02 22:51:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:19,413 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2021-11-02 22:51:19,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:51:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2021-11-02 22:51:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:51:19,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:19,415 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:51:19,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:19,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:19,626 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:51:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 351414953, now seen corresponding path program 1 times [2021-11-02 22:51:19,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:19,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465007444] [2021-11-02 22:51:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:19,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:51:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:51:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:20,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:20,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465007444] [2021-11-02 22:51:20,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465007444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:20,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160937831] [2021-11-02 22:51:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:20,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:20,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:20,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:51:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:20,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 22:51:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:20,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:51:20,830 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:51:20,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 22:51:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-02 22:51:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-02 22:51:21,360 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:51:21,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 60 [2021-11-02 22:51:21,386 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 22:51:21,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 66 [2021-11-02 22:51:21,659 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-02 22:51:21,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 122 [2021-11-02 22:51:21,704 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-02 22:51:21,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 131 [2021-11-02 22:51:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:51:24,822 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-02 22:51:24,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 146 [2021-11-02 22:51:25,361 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-02 22:51:25,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 158 [2021-11-02 22:51:25,382 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-02 22:51:25,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2021-11-02 22:51:25,567 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-02 22:51:25,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 130 [2021-11-02 22:51:25,599 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-02 22:51:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 124 [2021-11-02 22:51:26,055 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-02 22:51:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 137 [2021-11-02 22:51:26,087 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-02 22:51:26,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 133 [2021-11-02 22:51:26,277 INFO L354 Elim1Store]: treesize reduction 206, result has 16.3 percent of original size [2021-11-02 22:51:26,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 146 [2021-11-02 22:51:26,325 INFO L354 Elim1Store]: treesize reduction 174, result has 17.1 percent of original size [2021-11-02 22:51:26,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 151 [2021-11-02 22:51:26,620 INFO L354 Elim1Store]: treesize reduction 198, result has 1.5 percent of original size [2021-11-02 22:51:26,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 115 [2021-11-02 22:51:26,648 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-02 22:51:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 62 [2021-11-02 22:51:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:26,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160937831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:26,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:26,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-11-02 22:51:26,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788172297] [2021-11-02 22:51:26,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:51:26,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:51:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=741, Unknown=1, NotChecked=0, Total=812 [2021-11-02 22:51:26,735 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:52:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:58,613 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-11-02 22:52:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:52:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2021-11-02 22:52:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:58,615 INFO L225 Difference]: With dead ends: 191 [2021-11-02 22:52:58,615 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 22:52:58,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=347, Invalid=1991, Unknown=14, NotChecked=0, Total=2352 [2021-11-02 22:52:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 22:52:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 136. [2021-11-02 22:52:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 127 states have internal predecessors, (135), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-02 22:52:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2021-11-02 22:52:58,623 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 44 [2021-11-02 22:52:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:58,624 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2021-11-02 22:52:58,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:52:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2021-11-02 22:52:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:52:58,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:58,625 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:52:58,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:52:58,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:52:58,839 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:52:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash -218513743, now seen corresponding path program 1 times [2021-11-02 22:52:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:58,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624821279] [2021-11-02 22:52:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:58,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:52:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:59,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 22:52:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:01,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:01,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624821279] [2021-11-02 22:53:01,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624821279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:53:01,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990231413] [2021-11-02 22:53:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:53:01,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:53:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:53:01,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:53:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:53:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 22:53:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:53:02,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:53:02,151 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:53:02,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:53:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:53:02,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:53:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:02,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:53:02,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:02,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:53:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:37,793 INFO L354 Elim1Store]: treesize reduction 810, result has 5.7 percent of original size [2021-11-02 22:53:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 210 treesize of output 181 [2021-11-02 22:53:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:38,007 INFO L354 Elim1Store]: treesize reduction 1002, result has 5.4 percent of original size [2021-11-02 22:53:38,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 164 [2021-11-02 22:53:38,041 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-02 22:53:38,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 160 treesize of output 175 [2021-11-02 22:53:39,079 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-02 22:53:39,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 143 [2021-11-02 22:53:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:39,410 INFO L354 Elim1Store]: treesize reduction 414, result has 11.7 percent of original size [2021-11-02 22:53:39,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 193 treesize of output 186 [2021-11-02 22:53:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:39,513 INFO L354 Elim1Store]: treesize reduction 454, result has 11.5 percent of original size [2021-11-02 22:53:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 178 treesize of output 156 [2021-11-02 22:53:39,758 INFO L354 Elim1Store]: treesize reduction 230, result has 0.4 percent of original size [2021-11-02 22:53:39,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 157 treesize of output 94 [2021-11-02 22:53:39,780 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-11-02 22:53:39,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 44 [2021-11-02 22:53:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990231413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:53:39,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:53:39,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-11-02 22:53:39,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004791357] [2021-11-02 22:53:39,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:53:39,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:53:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=874, Unknown=15, NotChecked=0, Total=992 [2021-11-02 22:53:39,826 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 27 states have internal predecessors, (67), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:55:48,258 WARN L207 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-11-02 23:00:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:31,524 INFO L93 Difference]: Finished difference Result 228 states and 246 transitions. [2021-11-02 23:00:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:00:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 27 states have internal predecessors, (67), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-11-02 23:00:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:31,527 INFO L225 Difference]: With dead ends: 228 [2021-11-02 23:00:31,527 INFO L226 Difference]: Without dead ends: 228 [2021-11-02 23:00:31,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 229.9s TimeCoverageRelationStatistics Valid=269, Invalid=1988, Unknown=95, NotChecked=0, Total=2352 [2021-11-02 23:00:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-02 23:00:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2021-11-02 23:00:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 115 states have (on average 1.2782608695652173) internal successors, (147), 139 states have internal predecessors, (147), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 23:00:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2021-11-02 23:00:31,537 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 45 [2021-11-02 23:00:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2021-11-02 23:00:31,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 27 states have internal predecessors, (67), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:00:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2021-11-02 23:00:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:00:31,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:31,539 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 23:00:31,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:31,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:00:31,751 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 23:00:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:31,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1472008108, now seen corresponding path program 1 times [2021-11-02 23:00:31,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:31,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472087856] [2021-11-02 23:00:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:31,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:00:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:32,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-02 23:00:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:35,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:35,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472087856] [2021-11-02 23:00:35,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472087856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:35,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130103846] [2021-11-02 23:00:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:35,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:35,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:35,113 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:35,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_226eb62d-8c44-4e48-a183-0e9c2e46f39e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:00:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:00:35,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:35,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:00:35,688 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:00:35,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 23:00:35,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:00:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:01:11,823 INFO L354 Elim1Store]: treesize reduction 594, result has 6.6 percent of original size [2021-11-02 23:01:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 196 treesize of output 164 [2021-11-02 23:01:11,993 INFO L354 Elim1Store]: treesize reduction 734, result has 6.4 percent of original size [2021-11-02 23:01:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 147 [2021-11-02 23:01:12,039 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-02 23:01:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 146 treesize of output 161 [2021-11-02 23:01:12,940 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-02 23:01:12,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 143 [2021-11-02 23:01:13,342 INFO L354 Elim1Store]: treesize reduction 364, result has 12.5 percent of original size [2021-11-02 23:01:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 185 treesize of output 160 [2021-11-02 23:01:13,419 INFO L354 Elim1Store]: treesize reduction 328, result has 12.8 percent of original size [2021-11-02 23:01:13,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 160 [2021-11-02 23:01:34,625 INFO L354 Elim1Store]: treesize reduction 276, result has 1.1 percent of original size [2021-11-02 23:01:34,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 104 [2021-11-02 23:01:34,696 INFO L354 Elim1Store]: treesize reduction 196, result has 1.5 percent of original size [2021-11-02 23:01:34,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 53 [2021-11-02 23:01:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:35,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130103846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:35,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:35,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-11-02 23:01:35,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622153770] [2021-11-02 23:01:35,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:01:35,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:01:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1203, Unknown=20, NotChecked=0, Total=1332 [2021-11-02 23:01:35,189 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 32 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 23:03:29,747 WARN L207 SmtUtils]: Spent 8.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 38